UNITED STATES SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Form 20-F

ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF
THE SECURITIES EXCHANGE ACT OF 1934
For the fiscal year ended December 31, 2006

Commission File Number: 1-15132

Grupo Aeroportuario del Sureste, S.A.B. de C.V.

(Exact name of registrant as specified in its charter)

Southeast Airport Group		United Mexican States
(Translation of registrant’s name into English)		(Jurisdiction of incorporation or organization)

Bosque de Alisos No. 47A – 4^th Floor
Bosques de las Lomas
05120 México, D.F.
Mexico
(Address of principal executive offices)

Securities registered or to be registered pursuant to Section 12(b) of the Act:

		Name of each exchange
Title of each class:		on which registered
Series B Shares, without par value, or shares		New York Stock Exchange, Inc.*
American Depositary Shares, as evidenced by American Depositary Receipts, or ADSs, each representing ten shares		New York Stock Exchange, Inc.

Securities registered or to be registered pursuant to Section 12(g) of the Act:

None

Securities for which there is a reporting obligation pursuant to Section 15(d) of the Act:

N/A

Series B shares, without par value: 255,000,000

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act.

Yes þ      No o

If this report is an annual or transition report, indicate by check mark if the registrant is not required to file reports pursuant to Sections 13 or 15(d) of the Securities Exchange Act of 1934.

Yes o      No þ

Note—Checking the box above will not relieve any registrant required to file reports pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 from their obligations under those Sections.

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports) and (2) has been subject to such filing requirements for the past 90 days.

Yes þ      No o

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, or a non-accelerated filer. See definition of “accelerated filer and large accelerated filer” in Rule 12b-2 of the Exchange Act. (Check one):

Large accelerated filer þ      Accelerated filer o      Non-accelerated filer o

Indicate by check mark which financial statement item the registrant has elected to follow:

Item 17 o       Item 18 þ

If this is an annual report, indicate by check mark whether the registrant is a shell company (as defined by Rule 12b-2 of the Exchange Act).

Yes o      No þ

 

 

Item 1. Identity of Directors, Senior Management and Advisers			1
Item 2. Offer Statistics and Expected Timetable			1
Item 3. Key Information			1
Selected Financial Data			1
Exchange Rates			5
Risk Factors			6
Forward Looking Statements			23
Item 4. Information on the Company			23
History and Development of the Company			23
Business Overview			28
Regulatory Framework			45
Organizational Structure			61
Property, Plant, And Equipment			61
Item 4A. Unresolved Staff Comments			62
Item 5. Operating and Financial Review and Prospects			62
Item 6. Directors, Senior Management and Employees			86
Item 7. Major Shareholders and Related Party Transactions			98
Major Shareholders			98
Related Party Transactions			99
Item 8. Financial Information			100
Dividends			101
Item 9. The Offer and Listing			103
Trading on the Mexican Stock Exchange			103
Item 10. Additional Information			104
Material Contracts			121
Exchange Controls			121
Taxation			121
Documents On Display			126
Item 11. Quantitative and Qualitative Disclosures About Market Risk			127
Item 12. Description of Securities Other Than Equity Securities			127
Item 13. Defaults, Dividend Arrearages and Delinquencies			128
Item 14. Material Modifications to the Rights of Security Holders and Use of Proceeds			128
Item 15. Controls and Procedures			128
Item 16. Reserved			129
Item 16A. Audit Committee Financial Expert			129
Item 16B. Code of Ethics			129
Item 16C. Principal Accountant Fees and Services			130

Item 16D. Exemptions from the Listing Standards for Audit Committees			130
Item 16E. Purchases of Equity Securities by the Issuer and Affiliated Purchasers			130
Item 17. Financial Statements			131
Item 18. Financial Statements			131
Item 19. Exhibits			132
Consolidated Audited Financial Statements			F-i
EX-1.1: AMENDED AND RESTATED BY-LAWS
EX-3.2: AMENDMENT TO TRUST AGREEMENT
EX-4.4: AMENDMENT TO PARTICIPATION AGREEMENT
EX-12.1: CERTIFICATION
EX-12.2: CERTIFICATION
EX-13.1: CERTIFICATIONS
EX-15.1: ATTESTATION REPORT OF THE REGISTERED PUBLIC ACCOUNTING FIRM

PART I

Item 1. Identity of Directors, Senior Management and Advisers

     Not applicable.

Item 2. Offer Statistics and Expected Timetable

     Not applicable.

Item 3. Key Information

SELECTED FINANCIAL DATA

     We publish our financial statements in Mexican pesos. Pursuant to Financial Reporting Standards (Normas de Informacion Financiera) accepted in Mexico, or Mexican NIF, financial data for all periods in the financial statements included in Items 3, 5 and 8 and, unless otherwise indicated, throughout this Form 20-F have been restated in constant pesos as of December 31, 2006.

     This Form 20-F contains translations of certain peso amounts into U.S. dollars at specified rates solely for the convenience of the reader. These translations should not be construed as representations that the peso amounts actually represent such U.S. dollar amounts or could be converted into U.S. dollars at the rate indicated. Unless otherwise indicated, U.S. dollar amounts have been translated from Mexican pesos at an exchange rate of Ps. 10.8116 to U.S.$1.00, the exchange rate for pesos on January 2, 2007, as published by Banco de Mexico, the Mexican Central Bank. On June 29, 2007 the Federal Reserve Bank of New York’s noon buying rate for Mexican pesos was Ps. 10.79 to U.S.$1.00.

     The following tables present a summary of our consolidated financial information and that of our subsidiaries for each of the periods indicated. This information should be read in conjunction with, and is qualified in its entirety by reference to, our financial statements, including the notes thereto. Our financial statements are prepared in accordance with Mexican NIF, which differs in certain significant respects from generally accepted accounting principles in the United States, or U.S. GAAP. Reconciliation to U.S. GAAP of our net income and total stockholders’ equity is also provided in this summary financial data. Note 16 to our financial statements provides a description of the principal differences between Mexican NIF and U.S. GAAP as they relate to our business.

     Mexican NIF provides for the recognition of certain effects of inflation by restating non-monetary assets and non-monetary liabilities using the Mexican National Consumer Price Index, restating the components of stockholders’ equity using the Mexican National Consumer Price Index and recording gains or losses in purchasing power from holding monetary liabilities or assets. Mexican NIF requires the restatement of all financial statements to constant Mexican pesos as of the date of the more recent balance sheet presented. Our audited financial statements and all other financial information contained herein are accordingly presented in constant pesos with purchasing power as of December 31, 2006 unless otherwise noted.

     References in this annual report on Form 20-F to “dollars,” “U.S. dollars” or “U.S.$” are to the lawful currency of the United States of America. References in this annual report on Form 20-F to “pesos” or “Ps.” are to the lawful currency of Mexico. We publish our financial statements in pesos.

     This annual report on Form 20-F contains references to “workload units,” which are units measuring an airport’s passenger traffic volume and cargo volume. A workload unit currently is equivalent to one terminal passenger or 100 kilograms (220 pounds) of cargo.

     The summary financial and other information set forth below reflects our financial condition, results of operations and certain operating data since the year ended December 31, 2002.

		Year ended December 31,
		2002				2003				2004				2005				2006
		(in thousands of constant Mexican pesos as of December 31, 2006)(1)																				(thousands of
																						dollars)(2)
Income statement data:
Mexican NIF:
Revenues:
Aeronautical services(3)		Ps.	1,187,630			Ps.	1,318,613			Ps.	1,602,630			Ps.	1,520,152			Ps.	1,587,904			$	146,870
Non-aeronautical services(4)			271,316				340,181				521,961				627,308				651,057				60,218
Total revenues			1,458,946				1,658,794				2,124,591				2,147,460				2,238,961				207,088
Operating expenses:
Costs of services			(404,451	)			(418,176	)			(502,494	)			(558,116	)			(620,036	)			(57,349	)
Technical assistance fee(5)			(44,011	)			(52,168	)			(71,991	)			(69,123	)			(71,037	)			(6,570	)
Concession fee(6)			(72,905	)			(82,910	)			(106,189	)			(107,373	)			(111,804	)			(10,341	)
General and administrative expenses			(125,817	)			(136,865	)			(113,710	)			(129,384	)			(118,628	)			(10,972	)
Depreciation and amortization			(394,077	)			(401,089	)			(429,597	)			(451,674	)			(487,788	)			(45,117	)
Operating income			417,685				567,586				900,610				831,790				829,668				76,739
Net comprehensive financing (cost) income			31,951				27,386				(30,866	)			23,669				15,214				1,407
Income before taxes, employees’ statutory profit sharing and extraordinary items			449,636				594,972				869,744				855,459				844,882				78,146
Provision for income taxes and employees’ statutory profit sharing			(180,768	)			(262,325	)			(198,053	)			(260,115	)			(301,113	)			(27,851	)
Income before extraordinary items			268,868				332,647				671,691				595,344				543,769				50,295
Extraordinary items			(9,812	)			(20,267	)			(19,046	)			(9,327	)			(15,654	)			(1,448	)
Net income			259,056				312,380				652,645				586,017				528,115				48,847
Basic and diluted earnings per share			0.86				1.04				2.18				1.95				1.76				0.16
Basic and diluted earnings per ADS (unaudited)(7)			8.64				10.41				21.75				19.53				17.60				1.63
U.S. GAAP:
Revenues			1,458,946				1,658,794				2,124,591				2,147,460				2,235,092				206,731
Operating income			497,256				650,427				903,964				789,862				830,997				76,862
Net income (loss)			(406,723	)			304,729				267,153				470,261				415,961				38,474
Basic and diluted earnings per share			(1.36	)			1.02				0.89				1.57				1.39				0.13
Basic and diluted earnings per ADS (unaudited)(7)			(13.56	)			10.16				8.91				15.68				13.87				1.28
Dividends per share(8)			1.88				0.59				0.63				0.67				0.70				0.06
Other Operating Data (Unaudited):
Total passengers (thousands of passengers)			10,996.6				12,190.0				13,897.1				13,321.3				13,779.9				13,779.9
Total air traffic movements (thousands of movements)			194.9				198.0				219.8				209.9				220.5				220.5
Total revenues per passenger (in pesos or dollars)			132.7				136.1				152.9				161.2				162.5				15.0

		As of and for the year ended December 31,
		2002				2003				2004				2005				2006
		(in thousands of constant Mexican pesos as of December 31, 2006) (1)																				(thousands of
																						dollars)(2)
Balance Sheet Data:
Mexican NIF:
Cash and marketable securities		Ps.	584,267			Ps.	803,442			Ps.	1,250,811			Ps.	1,595,743			Ps.	1,241,678			$	114,847
Total current assets			849,950				1,155,653				1,543,010				1,933,931				1,640,690				151,753
Airport concessions, net			8,939,377				8,690,595				8,441,814				8,193,031				7,944,154				734,781
Rights to use airport facilities, net			2,470,923				2,386,955				2,309,871				2,183,373				2,165,316				200,277
Total assets			13,269,308				13,552,213				14,036,374				14,633,450				14,941,401				1,381,979
Current liabilities			144,431				176,365				206,148				367,164				245,341				22,692
Total liabilities			602,320				717,982				782,993				1,079,753				1,156,300				106,950
Capital Stock			12,335,507				12,335,507				12,335,507				12,335,507				12,335,507				1,140,951
Net equity/stockholders’ equity			12,666,988				12,834,231				13,253,381				13,553,697				13,785,101				1,140,951
U.S. GAAP:
Cash and cash equivalents			517,132				490,328				1,023,649				1,117,236				828,706				76,650
Total current assets			849,950				1,155,652				1,543,010				1,979,655				1,664,500				153,960
Airport concessions, net			269,775				208,581				149,009				89,448				29,796				2,756
Rights to use airport facilities			1,937,925				1,874,951				1,815,827				1,706,238				1,655,139				153,089
Total assets			7,181,713				7,338,586				7,447,822				7,885,714				7,974,239				737,563
Total liabilities			145,198				173,779				205,874				373,494				256,721				23,745
Capital Stock			6,736,070				6,736,070				6,736,070				6,736,070				6,736,070				623,041
Net equity/stockholders’ equity			7,036,515				7,164,807				7,241,948				7,512,220				7,717,518				713,818
Cash Flow Data:
Mexican NIF:
Resources provided by operating activities			659,975				742,604				1,207,267				1,288,464				1,031,626				95,418
Resources used in financing activities			(856,341	)			(145,139	)			(233,496	)			(285,702	)			(296,711	)			(27,444	)
Resources used in investing activities			(311,724	)			(378,292	)			(526,401	)			(657,830	)			(1,088,980	)			(100,723	)
Increase in cash and marketable securities			(508,090	)			219,173				447,370				344,932				(354,065	)			(32,749	)
U.S. GAAP:
Cash flow provided by operating activities			693,228				822,864				1,131,379				1,253,433				1,043,218				96,491
Cash flow used in financing activities			(856,341	)			(267,278	)			(259,435	)			(285,702	)			(296,711	)			(27,444	)
Cash flow (used in) provided by investing activities			139				(626,838	)			(353,866	)			(841,129	)			(991,516	)			(91,709	)
Effect of inflation on cash and cash equivalents			(11,639	)			44,447				15,245				(33,015	)			(43,521	)			(4,025	)
Increase (decrease) in cash and cash equivalents			(174,613	)			(26,805	)			533,323				93,587				(288,530	)			(26,687	)

EXCHANGE RATES

     The following table sets forth, for the periods indicated, the high, low, average and period-end, free-market exchange rate expressed in pesos per U.S. dollar. The average annual rates presented in the following table were calculated using the average of the exchange rates on the last day of each month during the relevant period. The data provided in this table is based on noon buying rates published by the Federal Reserve Bank of New York for cable transfers in Mexican pesos. We have not restated the rates in constant currency units. All amounts are stated in pesos. We make no representation that the Mexican peso amounts referred to in this annual report could have been or could be converted into U.S. dollars at any particular rate or at all.

		Exchange Rate
Year Ended December 31,		High				Low				Period End				Average(1)
2002			10.43				9.00				10.43				9.75
2003			11.41				10.11				11.24				10.85
2004			11.64				10.81				11.15				11.31
2005			11.41				10.41				10.63				10.89
2006			11.46				10.43				10.80				10.90
December 2006			10.99				10.77				10.80				10.85
2007:
January 2007			11.09				10.77				11.04				10.96
February 2007			11.16				10.92				11.16				11.00
March 2007			11.18				11.01				11.04				11.11
April 2007			11.03				10.92				10.93				10.98
May 2007			10.93				10.74				10.74				10.82

     Except for the period from September through December 1982, during a liquidity crisis, the Mexican Central Bank has consistently made foreign currency available to Mexican private-sector entities (such as us) to meet their foreign currency obligations. Nevertheless, in the event of renewed shortages of foreign currency, there can be no assurance that foreign currency would continue to be available to private-sector companies or that foreign currency needed by us to service foreign currency obligations or to import goods could be purchased in the open market without substantial additional cost.

     Fluctuations in the exchange rate between the peso and the U.S. dollar will affect the U.S. dollar value of securities traded on the Mexican Stock Exchange, and, as a result, will likely affect the market price of the ADSs. Such fluctuations will also affect the U.S. dollar conversion by the depositary of any cash dividends paid in pesos.

     On December 29, 2006, the Federal Reserve noon buying rate was Ps. 10.80 per U.S.$1.00. On June 29, 2007, the Federal Reserve noon buying rate was Ps. 10.79 per U.S. $1.00.

     For a discussion of the effects of fluctuations in the exchange rates between the peso and the U.S. dollar, see “Item 10. Additional Information—Exchange Controls.”

RISK FACTORS

Risks Related to Our Operations

Hurricanes and other natural disasters have adversely affected our business and could continue to do so in the future.

     The southeast region of Mexico, like other Caribbean destinations, experiences hurricanes, particularly during the third quarter of each year. Portions of the southeast region also experience earthquakes from time to time. Natural disasters may impede operations, damage infrastructure necessary to our operations and/or adversely affect the destinations served by our airports. Any of these events could reduce our passenger traffic volume. The occurrence of natural disasters in the destinations we serve has adversely affected, and could in the future adversely affect, our business, results of operations, prospects and financial condition. We have insured the physical facilities at our airports against damage caused by natural disasters, accidents or other similar events, but do not have insurance covering losses due to resulting business interruption. Moreover, should losses occur, there can be no assurance that losses caused by damages to the physical facilities will not exceed the pre-established limits on the policies. As a result of the impact of Hurricane Wilma described below, the cost of our annual insurance premium covering property damage from hurricanes increased from approximately U.S.$362,000 before Hurricane Wilma to U.S.$2.6 million currently.

     On October 21, 2005, Hurricane Wilma struck the Yucatan Peninsula, causing severe damage to the infrastructure of the Cancun and Cozumel airports and to our administrative office building in Cancun. Cancun and Cozumel airports were closed for approximately 62 hours and 42 hours, respectively, and airport operations were disrupted for several weeks thereafter. We were instructed by the Mexican government to repair Cancun Airport’s Terminal 1 building, and to put it back into service. The hurricane also inflicted extensive damage on the hotel and tourist infrastructure in Cancun, the Mayan Riviera region and Cozumel, which led to sharply reduced air passenger traffic at our airports, especially in the fourth quarter of 2005 and during the first half of 2006. During the fourth quarter of 2005, our passenger traffic decreased 33.1%, and revenues and operating income fell 32.6% and 86.5%, respectively, relative to the same period in 2004, reflecting the decline in passenger traffic. Due to a recovery in the second half of 2006, however, our total passenger for the year 2006 traffic rose 3.44%, our revenues rose 4.26% and our operating income was nearly unchanged (down 0.26%), each as compared to 2005. While tourism in Cancun and the Mayan Riviera has by now largely recovered from Hurricane Wilma, Cozumel is still in the process of recovering.

     Other hurricanes, such as Hurricane Emily in July 2005 and Hurricane Ivan in September 2004, have also affected our operations.

Our business is highly dependent upon revenues from Cancun International Airport.

     In 2005 and 2006, Ps.1,608.9 million and Ps.1,693.5 million, respectively, or 74.9% and 75.6% respectively, of our revenues were derived from operations at Cancun International Airport. During 2005 and 2006, Cancun International Airport represented 69.8% and 70.6%, respectively, of our passenger traffic and 44.7% and 44.1%, respectively, of our air traffic movements. The desirability of Cancun as a tourist destination and the level of tourism to the area is dependent on a number of factors, many of which are beyond our control. We cannot assure you that tourism in Cancun will not decline in the future, or that it will return to levels recorded before Hurricane Wilma. Any event or condition affecting Cancun International Airport or the areas that it serves could have a material adverse effect on our business, results of operations, prospects and financial condition.

The September 11, 2001 terrorist attacks had a severe impact on the international air travel industry and adversely affected our business. Similar events may do so again in the future.

The events of September 11, 2001 resulted in a significant decline in passenger traffic worldwide and future terrorist attacks could result in similar declines.

     The terrorist attacks on the United States on September 11, 2001 had a severe adverse impact on the air travel industry, particularly on U.S. carriers and carriers operating international service to and from the United States. Airline traffic in the United States fell precipitously after the attacks. In Mexico, airline and passenger traffic decreased substantially, although the decrease was less severe than in the United States. Our airports experienced a significant decline in passenger traffic following September 11, 2001. Any future terrorists attacks, whether or not involving aircraft, will likely adversely affect our business, results of operations, prospects and financial condition.

Security enhancements following the events of September 11, 2001 have resulted in increased costs and may expose us to greater liability.

     The air travel business is susceptible to increased costs resulting from enhanced security and higher insurance and fuel costs. Following the events of September 11, we reinforced security at our airports. For a description of the security measures that we adopted, see “Item 4. Information on the Company—Business Overview—Non-Aeronautical Services—Airport Security.” While enhanced security at our airports has not resulted in a significant increase in our operating costs to date, we may be required to adopt additional security measures in the future. In addition, our general liability insurance premiums for 2002 increased substantially relative to our 2001 premiums and may rise again in the future. Since October 2001, we carry a U.S.$50 million insurance policy covering liabilities resulting from terrorist acts. Because our insurance polices do not cover losses resulting from war in any amount or from terrorism for amounts greater than U.S.$50 million, we could incur significant costs if we were to be directly affected by events of this nature. Any such increase in our operating costs will have an adverse effect on our results of operations.

     The users of airports, principally airlines, have been subject to increased costs following the September 11 events. Airlines have been required to adopt additional security measures and

may be required to comply with more rigorous security guidelines in the future. Premiums for aviation insurance have increased substantially and could escalate further. While governments in other countries have agreed to indemnify airlines for liabilities they might incur resulting from terrorist attacks, the Mexican government has not done so and has given no indication of any intention to do the same. In addition, fuel prices and supplies, which constitute a significant cost for airlines using our airports, may be subject to increases resulting from any future terrorist attacks, a general increase in international hostilities or a reduction in output of fuel, voluntary or otherwise, by oil producing countries. Such increases in airlines’ costs have result in higher airline ticket prices and decreased demand for air travel generally, thereby having an adverse effect on our revenues and results of operations. In addition, because a substantial majority of our international flights involve travel to the U.S., we may be required to comply with security directives of the U.S. Federal Aviation Authority, in addition to the directives of Mexican aviation authorities.

     Mexican aviation authorities recently adopted International Civil Aviation Organization guidelines requiring checked baggage on all international commercial flights beginning in January 2006 to undergo a new comprehensive screening process. As of January 2006, we implemented the new screening system for all departing international flights, and we implemented the same system for domestic flights as of July 1, 2006. Although airlines, rather than holders of airport concessions, are responsible for baggage screening under Mexican law, we decided to purchase, install and operate the new screening equipment and supply this service to the airlines to facilitate their compliance with the new policy. This could expose us to liability relating to the purchase, installation and operation of the equipment, or require us to purchase, install and operate additional equipment, if, among other possibilities, the new screening procedures were to fail to detect or intercept any attempted terrorist act occurring or originating at our airports. We cannot estimate the cost to us of any such liability, if any were to arise.

International events could have a negative impact on international air travel and our business.

     Historically, a substantial majority of our revenues have been aeronautical services, and our principal source of aeronautical revenues is passenger charges. Passenger charges are payable for each passenger (other than diplomats, infants, transfer and transit passengers) departing from the airport terminals we operate, collected by the airlines and paid to us. In 2006, passenger charges represented 54.6% of our total revenues.

     International events such as the terrorist attacks on the United States on September 11, 2001, the war in Iraq and public health crises such as Severe Acute Respiratory Syndrome (or “SARS”) have disrupted the frequency and pattern of air travel worldwide in recent years. Because our revenues are largely dependent on the level of passenger traffic in our airports, any general increase of hostilities relating to reprisals against terrorist organizations, further conflict in the Middle East, outbreaks of health epidemics such as SARS, Avian influenza or other events of general international concern (and any related economic impact of such events) could result in decreased passenger traffic and increased costs to the air travel industry and, as a result, could cause a material adverse effect on our business, results of operations, prospects and financial condition.

Our revenues are highly dependent on levels of air traffic, which depend in part on factors beyond our control.

     Our revenues are closely linked to passenger and cargo traffic volumes and the number of air traffic movements at our airports. These factors directly determine our revenues from aeronautical services and indirectly determine our revenues from non-aeronautical services. Passenger and cargo traffic volumes and air traffic movements depend in part on many factors beyond our control, including economic conditions in Mexico and the United States, the political situation in Mexico and elsewhere in the world, the attractiveness of our airports relative to that of other competing airports, fluctuations in petroleum prices (which can have a negative impact on traffic as a result of fuel surcharges or other measures adopted by airlines in response to increased fuel costs) and changes in regulatory policies applicable to the aviation industry. Any decreases in air traffic to or from our airports as a result of factors such as these could adversely affect our business, results of operations, prospects and financial condition.

Increases in international petroleum prices could reduce demand for air travel.

     International prices of fuel, which represents a significant cost for airlines using our airports, have increased in recent years and may be subject to further increases resulting from any future terrorist attacks, a general increase in international hostilities or a reduction in output of petroleum, voluntary or otherwise, by oil-producing countries. Such increases in airlines’ costs have resulted in higher airline ticket prices and may decrease demand for air travel generally, thereby having an adverse effect on our revenues and results of operations.

Our business is highly dependent upon the operations of Mexico City International Airport.

     For the years ended December 2004, 2005 and 2006, approximately 83.5%, 84.3% and 80.6% respectively, of our domestic passengers flew to or from our airports via Mexico City International Airport. As a result, our domestic traffic is highly dependent upon the operations of Mexico City International Airport. Mexico City International Airport is currently in the process of increasing its capacity, but we cannot assure you that the airport’s operations will not decrease in the future, that the capacity increase will be completed or, if completed, result in an increase in passenger traffic at our airports. Any event or condition that adversely affects Mexico City International Airport could adversely affect our business, results of operations, prospects and financial condition.

Competition from other tourist destinations could adversely affect our business.

     One of the principal factors affecting our results of operations and business is the number of passengers using our airports. The number of passengers using our airports may vary as a result of factors beyond our control, including the level of tourism in Mexico. In addition, our passenger traffic volume may be adversely affected by the attractiveness, affordability and accessibility of competing tourist destinations in Mexico, such as Acapulco, Puerto Vallarta and Los Cabos, or elsewhere, such as Puerto Rico, Florida, Cuba, Jamaica, the Dominican Republic and other Caribbean island and Central American destinations. The attractiveness of the destinations we serve is also likely to be affected by perceptions of travelers as to the safety and

political and social stability of Mexico. There can be no assurance that tourism levels in the future will match or exceed current levels.

The loss of one or more of our key customers could result in a loss of a significant amount of our revenues.

     Although the global airlines industry has recently shown signs of recovering, it has experienced significant financial difficulties in recent years, marked by the filing for bankruptcy protection of several major carriers in the U.S. in recent years. Our business and results of operations could be adversely affected if we do not continue to generate comparable portions of our revenue from our key customers, including Mexicana (which accounted for 9.6%, 10.4% and 9.1% of our revenues in 2004, 2005 and 2006, respectively), American Airlines (which accounted for 6.8%, 6.1% and 5.8% of our revenues in 2004, 2005 and 2006, respectively), Aeromexico (which accounted for 6.2%, 5.1% and 5.9% of our revenues in 2004, 2005 and 2006, respectively) and Continental Airlines (which accounted for 5.4%, 5.1% and 4.7% of our revenues in 2004, 2005 and 2006, respectively). We do not have contracts with any airlines that obligate them to continue providing service to our airports. We can offer no assurance that competing airlines would seek to increase their flight schedules if any of our key customers reduced their use of our airports. We expect that we will continue to generate a significant portion of our revenues from a relatively small number of airlines in the foreseeable future. We can offer no assurance that any of these airlines will continue to use any or all of our airports. Our business and results of operations could be adversely affected if we do not continue to generate comparable portions of our revenue from our key customers.

     In addition, Mexican law prohibits an international airline from transporting passengers from one Mexican location to another (unless the flight originated outside Mexico), which limits the number of airlines providing domestic service in Mexico. Accordingly, we expect to continue to generate a significant portion of our revenues from domestic travel from a limited number of airlines.

Revenues from passenger charges are not secured, and we may not be able to collect amounts invoiced in the event of the insolvency of one of its principal airline customers.

     In recent years, many airlines have reported substantial losses. Our revenues from passenger charges from our principal airline customers are not secured by a bond or any other collateral. Thus, in the event of the insolvency of any of these airlines, we would not be assured of collecting any amounts invoiced to that airline in respect of passenger charges.

If a change in relations with our labor force should occur, such a change could have an adverse impact on our results of operations.

     Although we currently believe we maintain good relations with our labor force, if any conflicts with our employees were to arise in the future, including with our unionized employees (which accounted for approximately 39.0% of our total employees as of December 31, 2006), resulting events such as strikes or other disruptions that could arise with respect to our workforce could have a negative impact on our results of operations.

The operations of our airports may be disrupted due to the actions of third parties, which are beyond our control.

     As is the case with most airports, the operation of our airports is largely dependent on the services of third parties, such as air traffic control authorities and airlines. We are also dependent upon the Mexican government or entities of the government for provision of services such as energy, supply of fuel to aircraft at our airports and immigration services for our international passengers. We are not responsible for and cannot control the services provided by these parties. Any disruption in or adverse consequence resulting from their services, including a work stoppage or other similar event, may have a material adverse effect on the operation of our airports and on our results of operations.

Our business could be adversely affected by a downturn in the U.S. economy.

     In 2005 and 2006, 69.0% and 66.1% respectively, of the international passengers served by our airports arrived or departed on flights originating in or departing to the United States. Thus, our business is dependent on the condition of the U.S. economy, and is particularly influenced by trends in the United States relating to leisure travel, consumer spending and international tourism. Events and conditions affecting the U.S. economy may adversely affect our business, results of operations, prospects and financial condition.

     We cannot predict what effect any future terrorist attacks or threatened attacks on the United States or any retaliatory measures taken by the United States in response to these events may have on the U.S. economy. An economic downturn in the United States may negatively affect our results of operations and a prolonged economic crisis in the United States will likely have a material adverse effect on our results of operations.

Fernando Chico Pardo, through his own investment vehicles and his 51% interest in Inversiones y Tecnicas Aeroportuarias, S.A. de C.V., or ITA, has a significant influence as a shareholder and over our management, and his interests may differ from those of other stockholders.

     Following tender offers in the United States and Mexico for our Series B shares that expired on June 19, 2007, Agrupacion Aeroportuaria Internacional, S.A. de C.V. and Agrupacion Aeroportuaria Internacional II, S.A. de C.V., entities indirectly owned and controlled by Fernando Chico Pardo, now own 19.5% of our capital stock in the form of Series B shares. The results of the tender offers are described in greater detail in “Item 7—Major Shareholders and Related Party Transactions—Major Shareholders—Tender Offer by Fernando Chico Pardo.”

     In addition, ITA, an entity owned 51% by Mr. Chico Pardo and 49% by Copenhagen Airports A/S (“Copenhagen Airports”), holds Series BB shares representing 7.65% of our capital stock. These Series BB shares provide it with special management rights. For example, pursuant to our bylaws, ITA is entitled to present the board of directors the name or names of the candidates for appointment as chief executive officer, to remove our chief executive officer and to appoint and remove one half of the executive officers, and to elect two members of our board of directors. ITA also has the right to veto certain actions requiring approval of our stockholders. Our bylaws also provide ITA veto rights with respect to certain corporate actions so long as its Series BB shares represent at least

7.65% of our capital stock. Special rights granted to ITA are more fully discussed in “Item 10. Additional Information” and “Item 7. Major Shareholders and Related Party Transactions.”

     As a result, Mr. Chico Pardo, who is also the chairman of our board of directors and our Chief Executive Officer, is able to exert a significant influence over our management and matters requiring the approval of our stockholders. The interests of Mr. Chico Pardo, Copenhagen Airports and ITA may differ from those of our other stockholders, and there can be no assurance that Mr. Chico Pardo, Copenhagen Airports or ITA will exercise their rights in ways that favor the interests of our other stockholders. Furthermore, this concentration of ownership by Mr. Chico Pardo and the special rights granted to ITA may have the effect of impeding a merger, consolidation, takeover or other business combination involving ASUR.

Some of our board members and stockholders have business relationships that may generate conflicts of interest.

     Some of our board members or stockholders may have outside business relationships that generate conflicts of interest. For example, Fernando Chico Pardo, the chairman of our board of directors and the owner of 51% of the outstanding shares of ITA as well as 19.5% of ASUR’s shares, our principal stockholder, also is a member of the board of directors of Grupo Posadas, S.A. de C.V., a company that recently acquired an interest in Mexicana Airlines. Mexicana is our largest customer, accounting for 9.6%, 10.4% and 9.1% of our revenues in 2004, 2005 and 2006, respectively. Conflicts may arise between the interests of these or other individuals in their capacities as our shareholders and/or directors, on the one hand, and their outside business interests on the other. There can be no assurance that any conflicts of interest will not have an adverse effect on our shareholders.

Our operations are at greater risk of disruption due to the dependence of most of our airports on a single commercial runway.

     As is the case with many other domestic and international airports around the world, most of our airports, including Cancun International Airport, have only one commercial aviation runway. While we seek to keep our runways in good working order and to conduct scheduled maintenance during off-peak hours, we cannot assure you that the operation of our runways will not be disrupted due to required maintenance or repairs. In addition, our runways may require unscheduled repair or maintenance due to natural disasters, aircraft accidents and other factors that are beyond our control. The closure of any runway for a significant period of time could have a material adverse effect on our business, results of operations, prospects and financial condition.

     Due to a significant increase in air traffic operations at Cancun International Airport, we have concluded the necessary studies for the construction of a second runway at this airport and to date we have obtained substantially all of the land needed to construct the second runway in concession from the Mexican federal government. However, there can be no assurance that the land obtained will be adequate for building the second runway. If we are unable to carry out the construction or the operation of this second runway for any reason, it could limit the growth of our business and adversely affect our results of operations, future prospects or financial condition.

We are exposed to risk related to construction projects.

     The building requirements under our master development programs could encounter delays or cause us to exceed our budgeted costs for such projects, which could limit our ability to expand capacity at our airports, increase our operating or capital expenses and could adversely affect our business, results of operations, prospects and financial condition. Such delays or budgetary overruns also could limit our ability to comply with our master development programs.

We are exposed to risks inherent to the operation of airports.

     We are obligated to protect the public at our airports and to reduce the risk of accidents. As with any company dealing with members of the public, we must implement certain measures for the protection of the public, such as fire safety in public spaces, design and maintenance of car parking facilities and access routes to meet road safety rules. We are also obligated to take certain measures related to aviation activities, such as maintenance, management and supervision of aviation facilities, rescue and fire-fighting services for aircraft, measurement of runway friction coefficients and measures to control the threat from birds and other wildlife on airport sites. These obligations could increase our exposure to liability to third parties for personal injury or property damage resulting from our operations.

Our insurance policies may not provide sufficient coverage against all liabilities.

     While we seek to insure all reasonable risks, we can offer no assurance that our insurance policies would cover all of our liabilities in the event of an accident, terrorist attack or other incident. The markets for airport insurance and construction insurance are limited, and a change in coverage policy by the insurance companies involved could reduce our ability to obtain and maintain adequate or cost-effective coverage. A certain number of our assets cannot, by their nature, be covered by property insurance (notably aircraft movement areas, and certain civil engineering works and infrastructure). In addition, we do not currently carry business interruption insurance.

Changes to Mexican laws, regulations and decrees applicable to us could have a material adverse impact on our results of operations.

     The Mexican government has in recent years implemented changes, and is considering implementing additional reforms, to the tax laws applicable to Mexican companies, including ASUR. The terms of our concessions do not exempt us from any changes to the Mexican tax laws. Should the Mexican government implement changes to the tax laws that result in our having significantly higher income or asset tax liability, we will be required to pay the higher amounts due pursuant to any such changes, which could have a material adverse impact on our results of operations. In addition, changes to the Mexican constitution or to any other Mexican laws could also have a material adverse impact on our results of operations.

Risks Related to the Regulation of Our Business

Our concessions may be terminated under various circumstances, some of which are beyond our control.

     We operate each of our airports under 50-year concessions granted as of 1998 by the Mexican government. A concession may be terminated for a variety of reasons. For example, a concession may be terminated if we fail to make the committed investments required by the terms of that concession. In addition, in the event that we exceed the applicable maximum rate at an airport in any year, the Ministry of Communications and Transportation is entitled to reduce the applicable maximum rate at that airport for the subsequent year and assess a penalty. Violations of certain terms of a concession (including violations for exceeding the applicable maximum rate) can result in termination only if sanctions have been imposed for violation of the relevant term at least three times. Violations of other terms of a concession can result in the immediate termination of the concession. We would face similar sanctions for violations of the Mexican Airport Law or its regulations. Although we believe we are currently complying with the principal requirements of the Mexican Airport Law and its regulations, we are not in compliance with certain requirements under the regulations. These violations could result in fines or other sanctions being assessed by the Ministry of Communications and Transportation, and are among the violations that could result in termination of a concession if they occur three or more times. For a description of the consequences that may result from the violation of various terms of our concessions, the Mexican Airport Law or its regulations, see “Item 4. Information on the Company—Regulatory Framework—Penalties and Termination and Revocation of Concessions and Concession Assets.” Under applicable Mexican law and the terms of our concessions, our concessions may also be made subject to additional conditions, which we may be unable to meet. Failure to meet these conditions may also result in fines, other sanctions and the termination of the concessions.

     In addition, the Mexican government may terminate one or more of our concessions at any time through reversion (rescate), if, in accordance with applicable Mexican law, it determines that it is required by national security or in the public interest to do so. In the event of a reversion (rescate) of the public domain assets that are the subject of our concessions, such assets would revert to the Mexican government and the Mexican government under Mexican law would be required to compensate us, taking into consideration investments made and depreciation of the relevant assets, but not the value of the assets subject to the concessions, based on the methodology set forth in the reversion (rescate) resolution issued by the Mexican Ministry of Communications and Transportation. There can be no assurance that we will receive compensation equivalent to the value of our investment in our concessions and related assets in the event of such a reversion (rescate).

     In the event of war, natural disaster, grave disruption of the public order or an imminent threat to national security, internal peace or the economy, the Mexican government may carry out a requisition (requisa — step-in rights) with respect to our airports. The step-in rights may be exercised by the Mexican government as long as the circumstances warrant. In all cases, except international war, the Mexican government is required to indemnify us for damages and lost profits (daños y perjuicios) caused by such requisition, calculated at their real value (valor real); provided that if we were to contest the amount of such indemnification, the amount of the

indemnity with respect to damages (daños) shall be fixed by expert appraisers appointed by us and the Mexican government, and the amount of the indemnity with respect to lost profits (perjuicios) shall be calculated taking into consideration the average net income during the year immediately prior to the requisition. In the event of requisition due to international war, the Mexican government would not be obligated to indemnify us.

     In the event that any one of our concessions is terminated, whether through reversion (rescate) or otherwise, our other concessions may also be terminated. Thus, the loss of any concession would have a material adverse effect on our business and results of operations. For a discussion of events which may lead to a termination of a concession, see “Item 4. Information on the Company—Regulatory Framework—Penalties and Termination and Revocation of Concessions and Concession Assets.” Moreover, we are required to continue operating each of our nine airports for the duration of our concessions, even if one or more of them are unprofitable.

The Mexican government could grant new concessions that compete with our airports, including the Cancun International Airport.

     The Mexican government could grant additional concessions to operate existing government-managed airports, or authorize the construction of new airports, that could compete directly with our airports. The Mexican government has announced that it intends, at some point in the future, to grant a concession for a new airport in the Mayan Riviera through a public bidding process. The Mexican state of Quintana Roo has formed a majority state-owned company to seek any such concession that may be granted. Currently, the Mayan Riviera is served primarily by Cancun International Airport. We have no further details on the construction or projected opening of the airport and are unable to predict the effect that it may have on our passenger traffic or operating results if the project is successfully carried out. Any competition from this or other such airports could have a material adverse effect on our business and results of operations. Generally, the grant of a concession for a new or existing airport is required to be made pursuant to a public bidding process. In the event that a competing concession is offered in a public bidding process, it is currently our intention to participate in such process, but we cannot assure you that we will participate, or that we would be successful if we did participate. In addition, in certain circumstances, the Mexican government can grant concessions without conducting a public bidding process. Please see “Item 4. Information on the Company—Regulatory Framework—Grants of New Concessions” below. Grants of new concessions that compete with our airports could adversely affect our business, results of operations, prospects and financial condition.

We provide a public service regulated by the Mexican government and our flexibility in managing our aeronautical activities is limited by the regulatory environment in which we operate.

     Our aeronautical fees charged to airlines and passengers are, like most airports in other countries, regulated. In 2004, 2005 and 2006, approximately 75.4%, 70.8% and 70.9% respectively, of our total revenues were earned from aeronautical services, which are subject to price regulation under our maximum rates. These regulations may limit our flexibility in operating our aeronautical activities, which could have a material adverse effect on our business, results of operations, prospects and financial condition. In addition, several of the regulations

applicable to our operations and that affect our profitability are authorized (as in the case of our master development programs) or established (as in the case of our maximum rates) by the Ministry of Communications and Transportation for five-year terms. Except under limited circumstances, we generally do not have the ability to unilaterally change our obligations (such as the investment obligations under our master development programs or the obligation under concessions to provide a public service) or increase our maximum rates applicable under those regulations should our passenger traffic or other assumptions on which the regulations were based change during the applicable term. In addition, there can be no assurance that this price regulation system will not be amended in a manner that would cause additional sources of our revenues to be regulated.

We cannot predict how the regulations governing our business will be applied.

     Many of the laws, regulations and instruments that regulate our business were adopted or became effective in 1999, and there is only a limited history that would allow us to predict the impact of these legal requirements on our future operations. In addition, although Mexican law establishes ranges of sanctions that might be imposed should we fail to comply with the terms of one of our concessions, the Mexican Airport Law and its regulations or other applicable law, we cannot predict the sanctions that are likely to be assessed for a given violation within these ranges. We cannot assure you that we will not encounter difficulties in complying with these laws, regulations and instruments. Moreover, there can be no assurance that the laws and regulations governing our business will not change.

     The Ministry of Communications and Transportation has announced that it intends to establish a new, independent regulatory agency to supervise the operation of our airports, as well as those of other airports that have been opened to private investment. For further information on this agency, see “Item 4. Information on the Company—Regulatory Framework—New Regulatory Agency.” We cannot predict whether or when this new agency will be organized, the scope of its authority, the actions that it will take in the future or the effect of any such actions on our business.

The price regulatory system applicable to our airports does not guarantee that our consolidated results of operations, or that the results of operations of any airport, will be profitable.

     The system of price regulation applicable to our airports establishes an annual maximum rate for each airport, which is the maximum annual amount of revenues per work load unit (which is equal to one passenger or 100 kilograms (220 pounds) of cargo) that we may earn at that airport from services subject to price regulation. The maximum rates for our airports have been determined for each year through December 31, 2008. For a discussion of the framework for establishing our maximum rates and the application of these rates, see “Item 4. Information on the Company—Regulatory Framework—Price Regulation.” Under the terms of our concessions, there is no guarantee that the results of operations of any airport will be profitable.

     Our concessions provide that an airport’s maximum rates will be adjusted periodically for inflation. Although we are entitled to request additional adjustments to an airport’s maximum rates under certain circumstances, our concessions provide that such a request will be approved only if the Ministry of Communications and Transportation determines that certain events

specified in our concessions have occurred. The circumstances under which we are entitled to an adjustment are described under “Item 4. Information on the Company—Regulatory Framework—Price Regulation—Special Adjustments to Maximum Rates.” Therefore, there can be no assurance that any such request would be made or granted.

If we exceed the maximum rate at any airport at the end of any year, we could be subject to sanctions.

     Historically, we have set the prices we charge for regulated services at each airport as close as possible to the prices we are allowed to charge under the maximum rate for that airport. We expect to continue to pursue this pricing strategy in the future. For example, in 2006, our revenues subject to maximum rate regulation represented 99.05% of the amount we were entitled to earn under the maximum rates for all of our airports. There can be no assurance that we will be able to establish prices in the future that allow us to collect virtually all of the revenue we are entitled to earn from services subject to price regulation.

     The specific prices we charge for regulated services are determined based on various factors, including projections of passenger traffic volumes, the Mexican producer price index (excluding petroleum) and the value of the peso relative to the U.S. dollar. These variables are outside of our control. Our projections could differ from the applicable actual data, and, if these differences occur at the end of any year, they could cause us to exceed the maximum rate at any one or more of our airports during that year.

     If we exceed the maximum rate at any airport at the end of any year, the Ministry of Communications and Transportation may assess a fine and may reduce the maximum rate at that airport in the subsequent year. The imposition of sanctions for violations of certain terms of a concession, including for exceeding the airport’s maximum rates, can result in termination of the concession if the relevant term has been violated and sanctions have been imposed at least three times. In the event that any one of our concessions is terminated, our other concessions may also be terminated.

Depreciation of the peso may cause us to exceed our maximum rates.

     We aim to charge prices that are as close as possible to our maximum chargeable rates, and we are entitled to adjust our specific prices only once every six months (or earlier upon a cumulative increase of 5% in the Mexican producer price index (excluding petroleum)). However, we generally collect passenger charges from airlines 30 to 115 days following the date of each flight. Such tariffs for the services that we provide to international flights or international passengers are generally denominated in U.S. dollars but are paid in Mexican pesos based on the average exchange rate for the month prior to each flight. Accordingly, depreciation of the peso, particularly late in the year, could cause us to exceed the maximum rates at one or more of our airports, which could lead to the termination of one of our concessions. In the event that any one of our concessions is terminated, our other concessions may also be terminated.

Our results of operations may be adversely affected by required efficiency adjustments to our maximum rates.

Our maximum rates are subject to annual efficiency adjustments, which have the effect of reducing the maximum rates for each year to reflect projected efficiency improvements. For the five-year term ending December 31, 2008, an annual efficiency adjustment factor of 0.75% was established by the Ministry of Communications and Transportation. Future annual efficiency adjustments will be determined by the Ministry of Communications and Transportation in connection with the setting of each airport’s maximum rates every five years. For a description of these efficiency adjustments, see “Item 4. Information on the Company—Regulatory Framework—Price Regulation—Methodology for Determining Future Maximum Rates.” We cannot assure you that we will achieve efficiency improvements sufficient to allow us to maintain or increase our operating income as a result of the progressive decrease in each airport’s maximum rate.

Risks Related to Mexico

Economic developments in Mexico may adversely affect our business and results of operations.

     Although a substantial portion of our revenues is derived from foreign tourism, domestic passengers in recent years have represented approximately half of the passenger traffic volume in our airports. In addition, all of our assets are located, and all of our operations are conducted, in Mexico. As a result, our business, financial condition and results of operation could be adversely affected by the general condition of the Mexican economy, by a devaluation of the peso, by inflation and high interest rates in Mexico, or by political developments in Mexico.

Mexico has experienced adverse economic conditions.

     In the past 25 years, and as recently as the mid-1990s, Mexico has experienced adverse economic conditions, including high levels of inflation. From 1982 to 1987, Mexico experienced periods of slow or negative growth, high inflation, large devaluations of the peso and limited availability of foreign currency. In the late 1980s and early 1990s, Mexico’s growth rate increased, the inflation rate declined and the U.S. dollar/peso exchange rate was relatively stable. Beginning in December 1994 and continuing through 1995, Mexico experienced an economic crisis characterized by exchange rate instability, devaluation of the peso, high inflation, high domestic interest rates, negative economic growth, reduced consumer purchasing power and high unemployment.

     The economic crises occurred in the context of a series of internal disruptions and political events, including a large current account deficit, civil unrest in the southern state of Chiapas (in which one of our airports is located), the assassination of two prominent political figures, a substantial outflow of capital and a significant devaluation of the peso.

     In response, the Mexican government implemented a broad economic reform program. Economic conditions in Mexico improved in 1996 and 1997. However, a combination of factors led to a slowdown in Mexico’s economic growth in 1998. Notably, the decline in the international price of oil resulted in a reduction of federal revenues, approximately one third of which are derived from petroleum taxes and duties. In addition, the economic crises in Asia and

Russia and the financial turmoil in Argentina, Brazil, Venezuela and elsewhere produced greater volatility in the international financial markets, which further slowed Mexico’s economic growth. The Mexican government has reported that real GDP grew by 0.8%, 1.4%, 4.2%, 3.0% and 4.8%, respectively, in 2002, 2003, 2004, 2005 and 2006. In 2006, inflation in Mexico was 4.1%, interest rates on 28-day Mexican government treasury securities averaged 7.51% and the peso appreciated by 1.67% (in nominal terms) against the U.S. dollar.

     We cannot assure you that similar events, or political developments in Mexico, will not occur, or that any recurrence of these or similar events will not adversely affect our business, results of operations, prospects and financial condition.

Depreciation or fluctuation of the peso relative to the U.S. dollar could adversely affect our results of operations and financial condition.

     Following the devaluation of the peso in December 1994, the aggregate passenger traffic volume in our airports in 1995 decreased as compared to the prior year, reflecting a decrease in domestic passenger traffic volume that more than offset an increase in international passenger traffic volume. Any future depreciation of the peso is likely to reduce our aggregate passenger traffic volume, which may have a material adverse effect on our results of operations. In addition, we cannot assure you that any future depreciation of the peso would result in an increase in international passenger traffic.

     Devaluation or depreciation of the peso against the U.S. dollar may adversely affect the dollar value of an investment in the ADSs and the Series B shares, as well as the dollar value of any dividend or other distributions that we may make.

     As of December 31, 2006 less than 11.0% of our liabilities (U.S.$3.46 million) were dollar-denominated. Although we currently intend to fund the investments required by our business strategy through cash flow from operations, we may incur dollar-denominated debt to finance all or a portion of these investments. A devaluation of the peso would increase the debt service cost of any dollar-denominated indebtedness that we may incur and result in foreign exchange losses.

     Severe devaluation or depreciation of the peso, or government imposition of exchange controls, may also result in the disruption of the international foreign exchange markets and may limit our ability to transfer or to convert pesos into U.S. dollars and other currencies.

Political conditions in Mexico could materially and adversely affect Mexican economic policy and, in turn, our operations.

     National elections held on July 2, 2000 ended 71 years of rule by the Institutional Revolutionary Party (PRI) with the election of President Vicente Fox Quesada, a member of the National Action Party (PAN) and resulted in the increased representation of opposition parties in the Mexican Congress and in mayoral and gubernatorial positions. On July 2, 2006, Felipe Calderon Hinojosa, also of the PAN, was elected to succeed him. No single party currently has a majority in the Congress or Senate. This shift in political power has transformed Mexico from a one-party state to a pluralist democracy. Multiparty rule is still relatively new in Mexico and could result in economic or political conditions that could materially and adversely affect our

operations. The lack of a majority party in the legislature and the current lack of alignment between the legislature and the President could result in instability or deadlock.

Increased environmental regulation and enforcement in Mexico may affect us.

     The level of environmental regulation in Mexico has significantly increased in recent years, and the enforcement of environmental laws is becoming substantially more stringent. We expect this trend to continue and to be stimulated by international agreements between Mexico and the United States. There can be no assurance that environmental regulations or their enforcement will not change in a manner that could have a material adverse effect on our business, results of operations, prospects or financial condition.

Developments in other countries may affect the prices of securities issued by Mexican companies.

     The market value of securities of Mexican companies may be, to varying degrees, affected by economic and market conditions in other countries. Although economic conditions in these countries may differ significantly from economic conditions in Mexico, investors’ reactions to developments in any of these other countries may have an adverse effect on the market value of securities of Mexican issuers. In past years, prices of both Mexican debt and equity securities have been adversely affected by sharp declines in Asian securities markets and by economic crises in Russia, Brazil, Argentina and Venezuela. In addition, in recent years, economic conditions in Mexico have become increasingly correlated to economic conditions in the United States. There can be no assurance that the market value of our securities will not be adversely affected by events elsewhere.

Corporate disclosure.

     There may be different publicly available information about issuers of securities in Mexico than is regularly published by or about issuers of securities in certain countries with highly developed capital markets. In addition, differences in accounting and other reporting principles and standards may cause our results to differ substantially from those results that would have been obtained using other principles and standards, such as U.S. GAAP.

Mexican law and our bylaws restrict the ability of non-Mexican shareholders to invoke the protection of their governments with respect to their rights as shareholders.

     As required by Mexican law, our bylaws provide that non-Mexican shareholders shall be considered as Mexicans in respect of their ownership interests in ASUR and shall be deemed to have agreed not to invoke the protection of their governments in certain circumstances. Under this provision, a non-Mexican shareholder is deemed to have agreed not to invoke the protection of his own government by asking such government to interpose a diplomatic claim against the Mexican government with respect to the shareholder’s rights as a shareholder, but is not deemed to have waived any other rights it may have, including any rights under the U.S. securities laws, with respect to its investment in ASUR. If you invoke such governmental protection in violation of this agreement, your shares could be forfeited to the Mexican government.

It may be difficult to enforce civil liabilities against us or our directors, officers and controlling persons.

     ASUR is organized under the laws of Mexico, with its principal place of business (domicilio social) in Mexico City, and most of our directors, officers and controlling persons reside outside the United States. In addition, all or a substantial portion of our assets and their assets are located outside of the United States. As a result, it may be difficult for investors to effect service of process within the United States on such persons or to enforce judgments against them, including in any action based on civil liabilities under the U.S. federal securities laws. There is doubt as to the enforceability against such persons in Mexico, whether in original actions or in actions to enforce judgments of U.S. courts, of liabilities based solely on the U.S. federal securities laws.

The protections afforded to minority shareholders in Mexico are different from those in the United States.

     Under Mexican law, the protections afforded to minority shareholders are different from those in the United States. In particular, the law concerning fiduciary duties of directors is not as fully developed as in other jurisdictions, there is no procedure for class actions, and there are different procedural requirements for bringing shareholder lawsuits. As a result, in practice it may be more difficult for minority shareholders of ASUR to enforce their rights against us or our directors or controlling shareholder than it would be for shareholders of a company incorporated in another jurisdiction, such as the United States.

Risks Related to Our ADSs

You may not be entitled to participate in future preemptive rights offerings.

     Under Mexican law, if we issue new shares for cash as part of a capital increase, we generally must grant our shareholders the right to purchase a sufficient number of shares to maintain their existing ownership percentage in ASUR. Rights to purchase shares in these circumstances are known as preemptive rights. We may not legally be permitted to allow holders of ADSs in the United States to exercise any preemptive rights in any future capital increase unless we file a registration statement with the U.S. Securities and Exchange Commission, or SEC, with respect to that future issuance of shares, or the offering qualifies for an exemption from the registration requirements of the Securities Act of 1933, as amended.

     At the time of any future capital increase, we will evaluate the costs and potential liabilities associated with filing a registration statement with the SEC and any other factors that we consider important to determine whether we will file such a registration statement.

     We cannot assure you that we will file a registration statement with the SEC to allow holders of ADSs or shares in the United States to participate in a preemptive rights offering. In addition, under current Mexican law, sales by the depository of preemptive rights and distribution of the proceeds from such sales to you, the ADS holders, is not possible. As a result, your equity interest in ASUR may be diluted proportionately.

Holders of ADSs are not entitled to attend shareholders’ meetings, and they may only vote through the depositary.

     Under Mexican law, a shareholder is required to deposit its shares with the Secretary of the Company, the S.D. Indeval Institución para el Depósito de Valores, S.A. de C.V., a Mexican or foreign credit institution or a brokerage house in order to attend a shareholders’ meeting. A holder of ADSs will not be able to meet this requirement, and accordingly is not entitled to attend shareholders’ meetings. A holder of ADSs is entitled to instruct the depositary as to how to vote the shares represented by ADSs, in accordance with the procedures provided for in the deposit agreement, but a holder of ADSs will not be able to vote its shares directly at a shareholders’ meeting or to appoint a proxy to do so.

FORWARD LOOKING STATEMENTS

     This Form 20-F contains forward-looking statements. We may from time to time make forward-looking statements in our periodic reports to the Securities and Exchange Commission on Forms 20-F and 6-K, in our annual report to shareholders, in offering circulars and prospectuses, in press releases and other written materials and in oral statements made by our officers, directors or employees to analysts, institutional investors, representatives of the media and others. Examples of such forward-looking statements include:

•		projections of operating revenues, net income (loss), net income (loss) per share, capital expenditures, dividends, capital structure or other financial items or ratios,
•		statements of our plans, objectives or goals,
•		statements about our future economic performance or that of Mexico or other countries in which we operate, and
•		statements of assumptions underlying such statements.

     Words such as “believe,” “anticipate,” “plan,” “expect,” “intend,” “target,” “estimate,” “project,” “predict,” “forecast,” “guideline,” “should” and similar expressions are intended to identify forward-looking statements but are not the exclusive means of identifying such statements.

     Forward-looking statements involve inherent risks and uncertainties. We caution you that a number of important factors could cause actual results to differ materially from the plans, objectives, expectations, estimates and intentions expressed in such forward-looking statements. These factors, some of which are discussed above under “Risk Factors,” include material changes in the performance or terms of our concessions, developments in legal proceedings, economic and political conditions and government policies in Mexico or elsewhere, inflation rates, exchange rates, regulatory developments, customer demand and competition. We caution you that the foregoing list of factors is not exclusive and that other risks and uncertainties may cause actual results to differ materially from those in forward-looking statements.

     Forward-looking statements speak only as of the date they are made, and we do not undertake any obligation to update them in light of new information or future developments.

Item 4. Information on the Company

HISTORY AND DEVELOPMENT OF THE COMPANY

     Grupo Aeroportuario del Sureste, S.A.B. de C.V., or ASUR, is a corporation (sociedad anónima bursátil de capital variable) organized under the laws of Mexico. We were incorporated in 1998 as part of the Mexican government’s program for the opening of Mexico’s airports to private-sector investment. The duration of our corporate existence is indefinite. We are a holding company and conduct all of our operations through our subsidiaries. The terms “ASUR,” “we” and “our” in this annual report refer both to Grupo Aeroportuario del Sureste, S.A.B. de C.V. as well as Grupo Aeroportuario del Sureste, S.A.B. de C.V. together with its

subsidiaries. Our registered office is located at Bosque de Alisos No. 47A-4, Bosques de las Lomas, 05120 México, D.F., Mexico, telephone (5255) 5284-0400.

Investment by ITA

     As part of the opening of Mexico’s airports to investment, in 1998 the Mexican government sold a 15% equity interest in ASUR in the form of 45,000,000 Series BB shares to ITA pursuant to a public bidding process. Currently, Fernando Chico Pardo, our Chairman and Chief Executive Officer, holds 51% of ITA’s shares and Copenhagen Airports holds 49% of ITA’s shares.

     Mr. Chico Pardo became a stockholder in ITA in April 2004 when he acquired the 24.5% ownership stake of French group Vinci, S.A. in ITA and a 13.5% ownership stake of Spanish Ferrovial Aeropuertos, S.A in ITA. At the same time, Copenhagen Airports acquired Ferrovial Aeropuertos, S.A.’s 11.0% ownership interest in ITA, thereby increasing its participation in ITA from 25.5% to 36.5%. Mr. Chico Pardo acquired an additional 25.5% ownership stake in ITA through the exercise of his right of first refusal following the auction of such shares by NAFIN, a Mexican national credit institution and development bank controlled by the Mexican government. On April 29, 2005, Copenhagen Airports increased its participation in ITA from 36.5% to 49% through the purchase of shares from Mr. Chico Pardo.

     In connection with the tender offers and other transactions undertaken by Mr. Chico Pardo in June 2007, ITA converted 22,050,000 Series BB shares representing 7.35% of ASUR’s total outstanding capital stock into Series B shares and transferred such shares to Agrupación Aeroportuaria Internacional, S.A. de C.V. by means of a spin-off. As a result, ITA currently holds 22,950,000 Series BB shares representing 7.65% of ASUR’s total outstanding capital stock.

     Mr. Chico Pardo is the founder and President of Promecap, S.C. He serves as a board member of various organizations, including ITA, Grupo Posadas, Grupo Financiero Inbursa, Grupo Carso, Sanborns Hermanos and Sears Roebuck de Mexico.

     Copenhagen Airports is among the world’s leading airport operators and has won several international awards. Copenhagen Airport is Scandinavia’s main airport. In 2006, approximately 21 million passengers were served at Copenhagen Airport. Additionally, Copenhagen Airports owns and operates Roskilde Airport located about 30 kilometers from Copenhagen, and holds shares in Newcastle International Airport in England.

     ITA paid the Mexican government a total of Ps. 1,165.1 million (nominal pesos, excluding interest) (U.S.$120.0 million based on the exchange rates in effect on the dates of payment) in exchange for:

•		45,000,000 Series BB shares representing 15% of our outstanding capital stock (as of the date hereof, Series BB shares represent 7.65% of our outstanding capital stock. Please see “Item 7. Major Shareholders and Related Party Transactions—Major Shareholders—Tender Offer by Fernando Chico Pardo”),
•		three options to subscribe for newly issued Series B shares, all of which have expired unexercised, and
•		the right and obligation to enter into various agreements with us and the Mexican government, including a participation agreement, a technical assistance agreement and a

shareholders’ agreement under terms established during the public bidding process. These agreements are described in greater detail under “Item 7. Major Shareholders and Related Party Transactions—Related Party Transactions.”

     Under the technical assistance agreement, ITA provides management and consulting services and transfers industry “know-how” and technology to ASUR in exchange for a technical assistance fee. This agreement is more fully described in “Item 7. Major Shareholders and Related Party Transactions—Related Party Transactions.” The agreement provides us a perpetual and exclusive license in Mexico to use all technical assistance and “know-how” transferred to us by ITA or its stockholders during the term of the agreement. The agreement has an initial fifteen-year term, and is automatically renewed for successive five-year terms, unless one party provides the other a notice of termination within a specified period prior to a scheduled expiration date. ITA provides us assistance in various areas, including: development of our commercial activities, preparation of marketing studies focusing on increasing passenger traffic volume at our airports, assistance with the preparation of the master development plans that we are required to submit to the Ministry of Communications and Transportation with respect to each of our airports and the improvement of our airport operations.

     The technical assistance fee is equal to the greater of a fixed dollar amount or 5% of our annual consolidated earnings before comprehensive financing cost, income taxes and depreciation and amortization (determined in accordance with Mexican FRS and calculated prior to deducting the technical assistance fee under this agreement). The fixed dollar amount decreased during the agreement’s initial five years. The fixed dollar amount was U.S.$5.0 million in 1999 and 2000, and U.S.$3.0 million in 2001 and 2002. Since 2003, the fixed dollar amount is U.S.$2.0 million before the annual adjustment for inflation (measured by the U.S. consumer price index) as from the first anniversary of the technical assistance agreement. We believe that this structure creates an incentive for ITA to increase our annual consolidated earnings before net comprehensive financing cost, income and asset taxes and depreciation and amortization. ITA is also entitled to reimbursement for the out-of-pocket expenses it incurs in its provision of services under the agreement. Under Mexican tax law, companies may not deduct fees that are determined by reference to their profitability (as defined under Mexican tax law).

     The technical assistance agreement allows ITA, its stockholders and their affiliates to render additional services to ASUR only if the Acquisitions and Contracts Committee of our board of directors determines that these related persons have submitted the most favorable bid in a public bidding process involving at least three unrelated parties. For a description of this committee, see “Item 6. Directors, Senior Management and Employees—Committees.”

     Under our bylaws, the participation agreement and the technical assistance agreement, ITA has the right to elect two members of our board of directors (which currently consists of seven members) and their alternates, and to present the board of directors the name or names of the candidates for appointment as our chief executive officer, to remove our chief executive officer, and to appoint and remove half of our executive officers. As the holder of the Series BB shares, ITA’s consent is also required to approve certain corporate matters so long as ITA’s Series BB shares represent at least 7.65% of our capital stock. In addition, our bylaws, the participation agreement and the technical assistance agreement contain certain provisions

designed to avoid conflicts of interest between ASUR and ITA. The rights of ITA in our management are explained in “Item 6. Directors, Senior Management and Employees—Committees.” ITA’s stockholders have entered into an agreement regarding the exercise of ITA’s rights and performance of its obligations under our bylaws, the participation agreement, the technical assistance agreement and the option agreement. The ITA shareholder’s agreement is described in “Item 7. Major Shareholders and Related Party Transactions—Major Shareholders—ITA Trust and Shareholders’ Agreement.”

     The remaining 85% of our outstanding capital stock, which at that time (prior to the conversion in June 2007 by ITA of 22,050,000 Series BB shares into 22,050,000 Series B shares) consisted of 255,000,000 Series B shares, was sold by the Mexican government to a Mexican trust established by NAFIN. This trust subsequently sold the shares it held in us to the public. To our knowledge, the Mexican government no longer holds any of our shares.

     Currently, ITA is restricted from transferring any of its remaining Series BB shares. After December 18, 2008, ITA may sell in any year up to 20% of its remaining ownership interest in us represented by Series BB shares. Our bylaws provide that Series BB shares must be converted into Series B shares prior to transfer. For a more detailed discussion of ITA’s rights to transfer its stock, see “Item 10. Additional Information—Registration and Transfer.”

     As required under the participation agreement entered into in connection with the Mexican government’s sale of the Series BB shares of ASUR to ITA, ITA has transferred its Series BB shares to a trust, the trustee of which is Banco Nacional de Comercio Exterior, S.N.C. Under the terms of the participation agreement and the trust agreement, ITA’s key partners, currently Copenhagen Airports and Fernando Chico Pardo, are each required to maintain an ownership interest in ITA of a minimum of 25.5% prior to December 18, 2014 unless otherwise approved by the Ministry of Communications and Transportation. To the extent that a key partner acquires shares of ITA in excess of a 25.5% interest, this additional interest may be sold without restriction. See “Item 7. Major Shareholders and Related Party Transactions—Major Shareholders—ITA Trust and Shareholders’ Agreement” for a further description of these provisions. There can be no assurance that the terms of the participation agreement or the trust would not be amended to reduce or eliminate these ownership commitments. If ITA or any of its stockholders defaults on any obligation contained in the trust agreement, or if ITA defaults on any obligation contained in the participation agreement or the technical assistance agreement, after specified notice and cure provisions, the trust agreement provides that the trustee may sell 5% of the shares held in the trust and pay the proceeds of such sale to ASUR as liquidated damages.

     Pursuant to the terms of the trust, ITA may direct the trustee to vote shares currently representing 7.65% of our capital stock, regarding all matters other than capital reductions, payment of dividends, amortization of shares and similar distributions to our shareholders, which are voted by the trustee in accordance with the vote of the majority of Series B shares. The trust does not affect the veto and other special rights granted to the holders of Series BB shares described in “Item 10. Additional Information.”

Master Development Programs

     Under the terms of our concessions, each of our subsidiary concession holders is required to submit an updated master development plan for approval by the Ministry of Communications and Transportation every five years. Each master development plan covers a fifteen-year period and includes investment commitments for the regulated part of our business (including certain capital expenditures and improvements) for the succeeding five-year period and investment projections for the regulated part of our business (including certain capital expenditures and improvements) for the remaining ten years. Once approved by the Ministry of Communications and Transportation, these commitments become binding obligations under the terms of our concessions. Committed investments are minimum requirements, and our capital expenditures may exceed our investment commitments in any period. In December 2003, the Ministry of Communications and Transportation approved each of our current updated master development plans. These plans are in effect from January 1, 2004 to December 31, 2008.

     The following table sets forth our committed investments for the regulated part of our business for each airport pursuant to the terms of our current master development plans for the periods presented. Even though we have committed to invest the amounts in the table, those amounts could be lower or higher depending on the cost of each project.

Committed Investments

		Year ended December 31,
		2004				2005				2006				2007				2008				Total
		(thousands of pesos)(1)
Cancun(2)		Ps.	334,960			Ps.	432,206			Ps.	847,797			Ps.	1,052,919			Ps.	83,298			Ps.	2,751,180
Merida			25,184				27,710				46,255				31,188				2,321				132,658
Cozumel			10,598				68,984				12,442				16,280				10,828				119,132
Villahermosa			47,407				63,602				6,360				11,892				1,303				130,564
Oaxaca			21,502				21,150				10,257				6,624				4,829				64,362
Veracruz			25,161				21,287				11,616				11,205				1,496				70,765
Huatulco			9,820				5,450				3,990				6,816				52,560				78,636
Tapachula			20,202				4,447				9,217				8,158				801				42,825
Minatitlan			10,559				6,156				4,838				2,023				3,062				26,638
Total		Ps.	505,393			Ps.	650,992			Ps.	952,772			Ps.	1,147,105			Ps.	160,498			Ps.	3,416,760

     The following table sets forth our historical capital expenditures made with respect to the regulated and unregulated parts of our business in the periods indicated.

Capital Expenditures

Year ended December 31,		(thousands of pesos)(1)
2004		Ps.	442,937
2005			715,010
2006(2)			1,040,633

     In 2006, we spent Ps. 1,040.6 million for the construction of the Terminal 3 building at the Cancun airport, which began operation in May 2007. In 2005, we spent Ps. 715.0 million for purchases of machinery, furniture and equipment principally for the Cancun, Villahermosa and Merida airports. In 2004, we spent Ps. 442.9 million for such purchases principally for the Cancun, Huatulco and Veracruz airports.

     Although we currently intend to fund the investments and working capital required by our business strategy through cash flow from operations, we may incur debt to finance all or a portion of these investments in the future.

BUSINESS OVERVIEW

     We hold concessions to operate, maintain and develop nine airports in the southeast region of Mexico for fifty years from November 1, 1998. As operators of these airports, we charge airlines, passengers and other users fees for the use of the airports’ facilities. We also derive rental and other income from commercial activities conducted at our airports, such as the leasing of space to restaurants and retailers. Our concessions include the concession for Cancun International Airport, the second busiest airport in Mexico in 2006 in terms of passenger traffic, according to the Mexican Airport and Auxiliary Services Agency. We also hold concessions to operate the airports in Cozumel, Huatulco, Merida, Minatitlan, Oaxaca, Tapachula, Veracruz and Villahermosa.

     Mexico is one of the main tourist destinations in the world. Mexico has historically ranked in the top ten countries worldwide in terms of foreign visitors, with 21.3 million visitors in 2006, according to the Mexican Ministry of Tourism. Within Latin America and the Caribbean, Mexico ranked first in 2006 in terms of number of foreign visitors and income from tourism, according to the World Tourism Organization. The tourism industry is one of the largest generators of foreign exchange in the Mexican economy. Within Mexico, the southeast region (where our airports are located) is a principal tourist destination due to its beaches and cultural and archeological sites, which are served by numerous hotels and resorts.

     Cancun and its surroundings were the most frequently visited international tourism destination in Mexico in 2006, according to the Mexican Ministry of Tourism. Cancun International Airport represented 72.0%, 69.8% and 70.6% of our passenger traffic volume and 76.4%, 74.9% and 75.6% of our revenues in 2004, 2005 and 2006, respectively. At December 31, 2006, Cancun had approximately 23,824 hotel rooms, according to the Mexican Ministry of

Tourism. We believe that Cancun International Airport is positioned to benefit from its proximity to the Mayan Riviera, a 129-kilometer (80-mile) stretch of coastal resorts and hotels that is among Mexico’s most rapidly developing tourism areas. According to the Mexican National Trust for Tourism Development, the Mayan Riviera had approximately 31,397 hotel rooms as of December 31, 2006.

     Our airports served approximately 13.9 million passengers in 2004, approximately 13.3 million passengers in 2005 and approximately 13.8 million passengers in 2006. For year-by-year passenger figures, see “—Our Airports.”

     The United States currently is a significant source of passenger traffic volume in our airports. In 2004, 2005 and 2006, international passengers represented 61.6%, 60.7% and 58.2% respectively, of the total passenger traffic volume in our airports. In 2004, 2005 and 2006, 69.4%, 69.0% and 66.1% respectively, of the international passengers in our airports traveled on flights originating in or departing to the United States. As of December 31, 2006, 18 Mexican and 104 international airlines, including U.S.-based airlines such as American Airlines and Continental Airlines, were operating directly or through code-sharing arrangements (where one aircraft has two or more flight numbers of different, allied airlines) in our airports.

Aeronautical Services

     The following table sets forth our revenues for the period presented.

		2004				2005				2006
		(thousands of pesos)
Revenues:
Aeronautical Services		Ps.	1,602,630			Ps.	1,520,152			Ps.	1,587,904
Non-Aeronautical Services			521,961				627,308				651,057
Total		Ps.	2,124,591			Ps.	2,147,460			Ps.	2,238,961

     Aeronautical services represent the most significant source of our revenues. In 2004, 2005 and 2006, aeronautical revenues represented approximately 75.4%, 70.8% and 70.9%, of our total revenues, respectively. All of our revenues from aeronautical services are regulated under the “dual-till” price regulation system applicable to our airports.

     Our revenues from aeronautical services are derived from: passenger charges, landing charges, aircraft parking charges, charges for the use of passenger walkways and charges for the provision of airport security services. Charges for aeronautical services generally are designed to compensate an airport operator for its infrastructure investment and maintenance expense. Aeronautical revenues are principally dependent on three factors: passenger traffic volume, the number of air traffic movements and the weight of the aircraft.

Passenger Charges

     We collect a passenger charge for each departing passenger on an aircraft (other than diplomats, infants and transfer and transit passengers). We do not collect passenger charges from arriving passengers. Passenger charges are automatically included in the cost of a passenger’s ticket and generally collected twice monthly from each airline. As of December

2006, the charge for international passengers is U.S.$17.50 and the charge for domestic passengers is Ps. 146.5(nominal pesos) for Cancun and Veracruz airports. For Cozumel, Huatulco and Merida, Oaxaca and Villahermosa, and Minatitlan and Tapachula, we charge international passengers U.S.$15.20, $11.40, $16.15 and $19.70 and domestic passengers Ps. 140.80, 105.60, 149.60 and 183.00 (nominal pesos), respectively. International passenger charges are currently dollar-denominated, but generally collected in pesos based on the average exchange rate during the month prior to the flight. Domestic passenger charges are peso-denominated. In each of 2005 and 2006, passenger charges represented 80.0% and 76.9% respectively of our aeronautical revenues and 56.7% and 54.6% respectively, of our total revenues. From time to time we have offered discounts on passenger charges at certain of our airports.

Aircraft Landing and Parking Charges, Passenger Walkway Charges and Airport Security Charges

     We collect various charges from carriers for the use of our facilities by their aircraft and passengers. For each aircraft’s arrival, we collect a landing charge that is based on the average of the aircraft’s maximum takeoff weight and the aircraft’s weight without fuel. We also collect aircraft parking charges based on the time an aircraft is at an airport’s gate or parking position. Parking charges at several of our airports vary based on the time of day that the relevant service is provided (with higher fees generally charged during peak usage periods at certain of our airports). We collect aircraft parking charges the entire time an aircraft is on our aprons. Airlines are also assessed charges for the connection of their aircraft to our terminals through a passenger walkway. We also assess an airport security charge, which is collected from each airline based on the number of its departing passengers. We provide airport security services at our airports through third-party contractors. We also provide firefighting and rescue services at our airports.

     Landing charges represented 7.6%, 8.0% and 7.4%, of our aeronautical revenues and 5.7%, 5.7% and 5.3%, of our total revenues in 2004, 2005 and 2006, respectively. Aircraft parking charges represented 8.8%, 8.9% and 12.3%, of our aeronautical revenues and 6.6%, 6.3% and 8.7%, of our total revenues in 2004, 2005 and 2006, respectively. Airport security charges represented 2.0%, 1.5% and 1.4%, of our aeronautical revenue and 1.6%, 1.1% and 1.0%, of our total revenues in 2004, 2005 and 2006, respectively. Passenger walkway charges represented 1.6%, 1.6% and 1.9%, of our aeronautical revenues and 1.1%, 1.1% and 1.3%, of our total revenues in 2004, 2005 and 2006, respectively.

Non-aeronautical Services

General

     Non-aeronautical services have historically generated a proportionately smaller portion of our revenues. Our revenues from non-aeronautical services are derived from commercial activities (such as the leasing of space in our airports to retailers, restaurants, airlines and other commercial tenants) and access fees charged to providers of complementary services in our airports (such as catering, handling and ground transport). In 2004, 2005 and 2006, revenues from non-aeronautical services represented 24.6%, 29.2% and 29.1% respectively, of our total

revenues, of which 78.0%, 77.1% and 77.3% respectively, were derived from commercial revenues as defined under the Mexican Airport Law.

     Currently, the leasing of space in our airports to airlines and other commercial tenants represents the most significant source of our revenues from non-aeronautical services. Although certain of our revenues from non-aeronautical services are regulated under our “dual-till” price regulation system, our revenues from commercial activities (other than the lease of space to airlines and other airport service providers that is considered essential to an airport) are not regulated.

Commercial Activities

     Leading international airports generally generate an important portion of their revenues from commercial activities. An airport’s revenues from commercial activities is largely dependent on passenger traffic, its passengers’ level of spending, terminal design, the mix of commercial tenants and the basis of fees charged to businesses operating in the airport. Revenues from commercial activities also depend substantially on the percentage of traffic represented by international passengers due to the revenues generated from duty-free shopping.

     In 2002, we opened 40 new commercial spaces in six of our airports, including new duty-free shops, restaurants, bank and foreign exchange services, and convenience stores. In 2003 we continued developing the commercial spaces in our airports by opening new bars and restaurants in six of our airports as well as new retail stores in seven of our airports. In 2003 we dedicated additional space to advertising in our Cancun airport and set aside additional rental space for car exhibits at the Merida and Villahermosa airports. We opened 13 new retail stores in our Cancun, Merida and Oaxaca airports in 2004, and 16 new retail stores at the Cancun, Cozumel, Villahermosa, Oaxaca and Minatitlan airports in 2005.

     In 2006, we opened 11 new retail stores in our Cancun, Merida, Oaxaca, Villahermosa and Huatulco airports, and also entered into long-term agreements relating to commercial activities in Cancun airport’s new Terminal 3. In October 2006, we entered into an agreement with Aldeasa México, S.A. de C.V. for the operation of the duty-free shops to be located in Terminal 3. The agreement will run for ten years from the date of the opening of Terminal 3’s duty-free shops in 2007. The new duty-free shops will cover approximately 1,800 square meters and will have a walk-through layout. The agreement also provides for an increase in the rent paid by Aldeasa on its existing duty-free shops in our Cancun airport’s Terminal 2, Cozumel and Merida, as well as an extension of the terms of the leases on these stores.

     In June 2006, we entered into a ten-year agreement with AB T3, S.A. de C.V. to provide food and beverage services at our Cancun airport’s new Terminal 3. The facilities at Terminal 3 include 2000 square meters of food and beverage retail space, comprising a total of 10 units, with brands and concepts aimed at providing the airport’s international passengers with world-class service. Additionally, as of July 1, 2006, AB T2, S.A. de C.V. assumed responsibility for the operation of the restaurant and snack bar at the Cancun airport’s Terminal 2 that were previously operated directly by the Cancun airport. Our contract with the current provider, Mera Aeropuertos, S.A de C.V., was also extended, with an amendment to provide for a higher concession fee paid by the leaseholder. These facilities had been part of

ASUR’s direct commercial operations since May 2004. AB T2, AB T3, and Mera Aeropuertos are all affiliates of Controladora Mera, S.A. de C.V.

     We estimate that prior to 2000 revenues from commercial activities in our terminals accounted for less than 15% of the total revenues generated by our airports. In contrast, we believe that revenues from commercial activities account for 25% or more of the consolidated revenues of many leading international airports. Accordingly, a significant part of our business strategy is focused on increasing our revenues from commercial activities in our airports.

     Within our nine airports, we leased approximately 235 commercial premises as of December 31, 2006, including restaurants, banks, retail outlets (including duty-free stores), currency exchange bureaus and car rental agencies. Our most important tenant in terms of occupied space and revenue in 2006 were Aldeasa and Mera Aeropuertos and its affiliates. Generally, concessionaires pay a monthly fee based on the higher of a fixed amount or a percentage of their revenues.

     We are currently involved in legal proceedings in which we are seeking a confirmation of our right to terminate certain lease agreements upon the expiration of their term. These proceedings include litigation involving the duty-free stores in Cancun, Terminal 2. Although we cannot predict when these proceedings will end, we expect that they will ultimately be resolved in our favor.

     In April 2005, the International Court of Arbitration issued a final ruling requiring Dufry Mexico, S.A. de C.V., among other requirements, to deliver one of the duty-free stores that it operated in the Cancun airport and to pay Ps. 41.1 million to ASUR. Dufry complied with this ruling by making payment of Ps. 7.3 million in May 2005 and Ps. 33.8 million in August 2005.

Access Charges

     At each of our airports, we earn revenues from charging access fees to various third-party providers of complementary services, including luggage check-in, sorting and handling, aircraft servicing at our gates, aircraft cleaning, cargo handling, aircraft catering services and assistance with passenger boarding and deplaning. Our revenues from access charges are regulated under our “dual-till” price regulation system. Under current regulations, each of these services may be provided by the holder of an airport concession, by a carrier or by a third party hired by a concession-holder or a carrier. Typically, these services are provided by third parties, whom we charge an access fee based on a percentage of revenues that they earn at our airports. Six different contractors provide handling services at our nine airports.

     Consorcio Aeromexico, the parent of the Aeromexico airline, and Grupo Mexicana together own Servicios de Apoyo en Tierra or “SEAT,” a company that provides certain complementary services, such as baggage handling, to various carriers at airports throughout Mexico. SEAT operated at our airports prior to our commencement of operations under our concessions and continues to do so. Under the Mexican Airport Law, third-party providers of complementary services are required to enter into agreements with the respective concession holder at that airport, which we did as of December 27, 2000.

     Under the Mexican Airport Law, we are required to provide complementary services at each of our airports if there is no third party providing such services. SEAT is currently the sole provider of baggage handling services at five of our airports. If SEAT ceased to provide such services directly, we could be required to provide these services or find a third party to provide such services.

Automobile Parking and Ground Transport

     Each of our airports has public car parking facilities consisting of open-air parking lots. The only airport at which we do not charge parking fees is Cozumel. In 2004, 2005 and 2006, our revenues from parking lot fees were Ps. 27.7 million, Ps.34.0 million and Ps.37.7 million, respectively. Revenues from parking at our airports currently are not regulated, although they could become regulated upon a finding by the Mexican Antitrust Commission that there are no competing alternatives.

     We collect revenues from various commercial vehicle operators, including taxi, bus and other ground transport operators. Our revenues from permanent providers of ground transport services, such as access fees charged to taxis, are regulated activities, while our revenues from non-permanent providers of ground transport services, such as access fees charged to charter buses, are not regulated revenues.

Airport Security

     The General Office of Civil Aviation, Mexico’s federal authority on aviation, and the Office of Public Security issue guidelines for airport security in Mexico. At each of our airports, security services are provided by independent security companies that we hire. In recent years, we have undertaken various measures to improve the security standards at our airports. These measures included increasing the responsibilities of the private security companies that we hire, the implementation in accordance with regulations issued by the International Civil Aviation Organization (ICAO) of integrated computer tomography and baggage detection system for international and domestic flights to detect explosive traces, the modernization of our carry-on luggage scanning and security equipment, the implementation of strict access control procedures to the restricted areas of our airports and the installation of a closed-circuit television monitoring system in some of our airports.

     In response to the September 11, 2001 terrorist attacks in the United States, we have taken additional steps to increase security at our airports. At the request of the Transport Security Administration of the United States, the General Office of Civil Aviation issued directives in October 2001 establishing new rules and procedures to be adopted at our airports. Under these directives, these rules and procedures were to be implemented immediately and for an indefinite period of time.

     To comply with these directives, we reinforced security by:

•		increasing and improving the security training of airport personnel,
•		increasing the supervision and responsibilities of both our security personnel and airline security personnel that operate in our airports,

•		issuing new electronic identification cards to airport personnel,
•		reinforcing control of different access areas of our airports, and
•		physically changing the access points to several of the restricted areas of our airports.

     Airlines have also contributed to the enhanced security at our airports as they have adopted new procedures and rules issued by the General Office of Civil Aviation applicable to airlines. Some measures adopted by the airlines include adding more points for verification of passenger identification, inspecting luggage prior to check-in and reinforcing controls over access to airplanes by service providers (such as baggage handlers and food service providers). As of January 1, 2006, we are providing additional services to the airlines, including providing facilities to assist airlines in complying with requirements to screen all checked baggage on international flights. We began providing similar assistance to domestic flights as of July 1, 2006.

Fuel

     All airport property and installations related to the supply of aircraft fuel were retained by the Mexican Airport and Auxiliary Services Agency in connection with the opening of Mexico’s airports to private investment. Pursuant to our concessions, the Mexican Airport and Auxiliary Services Agency has entered into agreements obligating it to pay each of our subsidiary concession holders a fee for access to our facilities equivalent to 1% of the service charge for fuel supply. In the event that the Mexican government were to privatize fuel supply activities in the future, the terms of our concessions provide that it will do so through a competitive bidding process.

Our Airports

     In 2006, our airports served a total of 13.8 million passengers, approximately 58.2% of which were international passengers. In 2005, our airports served a total of 13.3 million passengers, approximately 60.7% of which were international passengers. In 2004, our airports served a total of 13.9 million passengers, approximately 61.6% of which were international passengers. In 2004, 2005 and 2006, Cancun International Airport accounted for 72.0%, 69.8% and 70.6% of the passenger traffic volume and 76.4%, 74.9% and 75.6% of revenues, respectively, from our nine airports.

     All of our airports are designated as international airports under Mexican law, which indicates that they are equipped to receive international flights and have customs and immigration facilities.

     The following table sets forth the number of passengers served by our airports based on flight origination or destination.

Passengers by Flight Origin or Destination⁽¹⁾
(in thousands)

																						Percentage of
Region		2002				2003				2004				2005				2006				Total 2006
Mexico(2)			4,814				5,309				5,620				5,493				6,016				43.7	%
United States			4,438				4,925				5,928				5,580				5,301				38.5	%
Europe			790				985				1,265				1,201				1,354				9.8	%
Canada			632				712				805				767				851				6.2	%
Latin America			315				256				279				280				255				1.8	%
Asia and others			8				3				0				0				3				0.0	%
Total			10,997				12,190				13,897				13,321				13,780				100	%

     In 2004, 2005 and 2006, approximately 83.5%, 84.3% and 80.6% respectively, of our domestic passengers traveled to or from Mexico City.

     The following table sets forth the total traffic volume and air traffic movements in our nine airports for the periods presented:

Airport Traffic
(in thousands)

		Year ended December 31,
		2002				2003				2004				2005				2006
Passengers:
Total			10,996.6				12,190.0				13,897.3				13,321.3				13,779.9
Air traffic movements:(1)
Total			194.9				198.0				219.8				209.9				220.5

     The following table sets forth the passenger traffic volume for each of our airports during the periods indicated:

Passenger Traffic
(in thousands)

		Year ended December 31,
		2002				2003				2004				2005				2006
Cancun			7,718.0				8,684.2				10,010.7				9,301.5				9,728.1
Merida			849.6				899.6				931.1				1,021.9				1,007.2
Cozumel			445.9				455.8				584.4				486.6				370.7
Villahermosa			499.1				599.7				673.3				717.4				725.0
Oaxaca			433.2				461.0				543.2				563.7				495.6
Veracruz			479.6				514.6				563.5				579.4				718.0
Huatulco			268.4				259.4				270.8				312.0				375.3
Tapachula			176.8				184.8				193.8				192.3				188.1
Minatitlan			126.0				130.9				126.5				146.5				171.9
Total			10,996.6				12,190.0				13,897.3				13,321.3				13,779.9

Air Traffic Movements by Airport⁽¹⁾

		Year ended December 31,
		2002				2003				2004				2005				2006
Cancun			82,730				87,347				97,575				93,761				97,228
Merida			22,827				24,213				26,534				25,449				27,610
Cozumel			14,015				12,813				14,355				13,381				12,122
Villahermosa			18,244				20,299				22,267				19,892				21,098
Oaxaca			15,479				15,111				17,502				17,796				16,148
Veracruz			19,034				19,737				22,228				20,520				24,905
Huatulco			5,922				5,461				6,152				6,996				7,179
Tapachula			12,032				7,658				7,686				6,169				6,621
Minatitlan			4,602				5,362				5,598				5,937				7,625
Total			194,885				198,001				219,897				209,901				220,536

     The following table sets forth the air traffic movements in our airports for the periods indicated in terms of commercial, charter and general aviation:

Air Traffic Movements by Aviation Category

		Year ended December 31,
		2002				2003				2004				2005				2006
Commercial Aviation			147,362				143,788				162,596				157,686				168,711
Charter Aviation			14,700				22,535				23,061				20,004				17,747
General Aviation(1)			32,823				31,678				34,240				32,211				34,078
Total			194,885				198,001				219,897				209,901				220,536

Cancun International Airport

     Cancun International Airport is our most important airport in terms of passenger volume, air traffic movements and contribution to revenues. In 2006, Cancun International Airport was the second busiest airport in Mexico in terms of passenger traffic, according to the Mexican Airport and Auxiliary Services Agency. The airport is located approximately 16 kilometers (ten miles) from the city of Cancun, which has a population of approximately 519,000. In 2004, 2005 and 2006, approximately 7.8 million, 7.5 million and 9.7 million passengers, respectively, traveled through Cancun International Airport’s main terminal. Of these passengers, in 2004, 2005 and 2006, 77.6%, 78.5%, and 75.1% respectively, were international passengers. A substantial majority of the airport’s international passengers (69.4% in 2004, 69.0% in 2005 and 65.9% in 2006) began or ended their travel in the United States. The airport’s most important points of origin and destination are Mexico City, Miami, Houston, Dallas and New York. Due to the airport’s significant number of passengers from the United States, its traffic volume and results of operations are substantially dependent on economic conditions in the United States. See “Item 3. Key Information—Risk Factors—Risks Related to Our Operations—Our business could be adversely affected by a downturn in the U.S. economy.”

     During 2006, approximately 100,000 passengers traveled through the charter terminal (Terminal 1) in Cancun International Airport. Combined with the 9.6 million passengers that traveled through the main terminal (Terminal 2), a total of 9.7 million passengers were served by Cancun International Airport in 2006.

     Cancun is located in the state of Quintana Roo. Cancun and its surroundings was the most visited international tourism destination in Mexico in 2006, according to the Mexican Ministry of Tourism. According to the Mexican National Trust for Tourist Development, the Cancun area had approximately 23,824 hotel rooms as of December 31, 2006. Although Cancun may be reached by land, sea or air, we believe most tourists arrive by air through Cancun International Airport. Cancun is between approximately one and a half and five hours by air from all major cities in the United States and 10 to 13 hours by air from most major European cities.

     Cancun is located near beaches, coral reefs, ecological parks and Mayan archeological sites. Cancun International Airport serves travelers visiting the Mayan Riviera, which stretches from Cancun south to the Mayan ruins at Tulum, and includes coastal hotels and resorts in the towns of Playa del Carmen, Tulum and Akumal. According to the Mexican National Trust for Tourism Development, the greater Cancun area (including the Mayan Riviera) was estimated to have an aggregate of approximately 55,221 hotel rooms as of December 31, 2006.

     Since most of the airport’s passengers are tourists, the airport’s traffic volume and results of operations are influenced by the perceived attractiveness of Cancun as a tourist destination. See “Item 3. Key Information—Risk Factors—Risks Related to Our Operations—Our business could be adversely affected by a downturn in the U.S. economy.”

     As part of our commercial strategy, in the fourth quarter of 2005 we completed an expansion of 8,224 square meters (approximately 88,621 square feet) and a remodeling of 1,387

square meters (approximately 14,445 square feet), giving us a total of 69,584 square meters (approximately 749,004 square feet) of which 10,147 square meters (109,221 square feet) are for commercial use in Cancun International Airport’s main terminal. We are currently pursuing the eviction of several commercial tenants that occupy a small part of this area. In April 2006, we obtained a license to develop cargo facilities at the airport, which are currently being operated by Asur Carga, S.A. de C.V.

     Cancun International Airport currently has one runway with a length of 3,500 meters (2.2 miles). Due to a significant increase in passengers at Cancun International Airport, we have initiated the necessary studies for the construction of a second runway, and have obtained substantially all the land for the second runway in concession from the Mexican federal government. However, there can be no assurance that the land obtained will be adequate for building the second runway. If, for any reason, we are unable to carry out the construction of this second runway, it could limit the growth of our business and adversely affect our results of operations, future prospects or financial condition.

     The airport’s facilities include Terminal 1 (the charter terminal), Terminal 2 (the main terminal, which includes a wing referred to as the satellite wing), Terminal 3 (the new terminal that commenced operations in May 2007 as described below) and a general aviation building that handles private aircraft. The airport has 33 gates, ten of which are accessible by passenger walkways. The main terminal has nine gates accessible by passenger walkways, and the charter terminal has one gate that is accessible by a passenger walkway.

     The airport’s main terminal (including the satellite terminal wing) has a total area of approximately 49,011 square meters (approximately 527,285 square feet). The charter terminal in Cancun International Airport, which we acquired on June 30, 1999, has an additional 20,500 square meters (approximately 220,500 square feet).

     On December 6, 2005, we began construction on Terminal 3, which we opened on May 17, 2007, and which began operations on May 18, 2007. With a total investment of approximately U.S.$100 million, Terminal 3 constitutes our most ambitious investment project to-date. Terminal 3 will double international passenger capacity at Cancun International Airport. The new building, measuring a total area of 42,000 square meters (approximately 452,084 square feet), will feature 84 check-in counters and 11 boarding gates with boarding bridges, as well as four gates served by buses. The terminal will feature state-of-the-art passenger information systems and security equipment, including the first CT scanning system in Mexico for all checked baggage.

     As of December 2004, we charge taxis and passenger vans an access fee of Ps. 15.0, and buses an access fee of Ps. 25.0, upon entering the airport.

     On October 21, 2005, Hurricane Wilma struck the Yucatan Peninsula, causing severe damage to the infrastructure of the Cancun airport and to our administrative office building in Cancun. The airport’s power sources, as well as its control tower and air navigation systems, were knocked out. Cancun airport closed on October 21 at approximately 6:00 p.m. and reopened on October 24 at approximately 8:00 a.m. Airport operations did not return to normal for several weeks.

In July 2005, we temporarily closed the Cancun airport for approximately 16 hours as a safety precaution in anticipation of Hurricane Emily.

     In October 2004, the Mexican state of Quintana Roo formed a majority state-owned company, Aeropuerto Internacional de la Riviera Maya, S.A. de C.V., to seek a concession from the Mexican federal government to build and operate a new airport in the Mayan Riviera region of the state, which is currently served primarily by Cancun International Airport. The President of Mexico has publicly announced the intention, at some point in the future, of the Mexican federal government to initiate a public bidding process to build an airport to service the Mayan Riviera. ASUR has no further details on the construction or projected opening of the airport and is unable to predict the effect that it may have on our passenger traffic or operating results if the project is successfully carried out.

     In January 2005, Aeropuerto de Cancun, S.A. de C.V. made equity contributions to Aeropuerto de Huatulco, S.A. de C.V., Aeropuerto de Cozumel, S.A. de C.V., Aeropuerto de Veracruz, S.A. de C.V., Aeropuerto de Tapachula, S.A. de C.V. and Aeropuerto de Minatitlan, S.A. de C.V. As a result, Aeropuerto de Cancun, S.A. de C.V. currently has equity participation of 24.2%, 18.1%, 8.9%, 30.0% and 30.0% in these airports, respectively.

Merida International Airport

     Merida International Airport serves the inland city of Merida, which has a population of approximately 920,000, and surrounding areas in the state of Yucatan. Merida International Airport ranked second among our airports in 2006 in terms of passenger traffic and contribution to revenues. During 2004, 2005 and 2006, Merida International Airport served 931,127, 1,021,902 and 1,007,210 passengers, respectively, the substantial majority of which were domestic. The airport’s primary point of origin and destination is Mexico City.

     Merida International Airport attracts a mix of both business travelers and tourists. The city of Merida is an established urban area with numerous small and medium-sized businesses. The city is approximately 120 kilometers (75 miles) by highway from Chichen Itza and approximately 80 kilometers (50 miles) from Uxmal, pre-Columbian archeological sites that attract a significant number of tourists.

     The airport has two perpendicular runways, one with a length of 3,200 meters (2.0 miles) and another with a length of 2,300 meters (1.4 miles). The airport has one main terminal, with four gates accessible by passenger walkways and six remote boarding positions. As part of our commercial strategy, we remodeled the entire 7,110 square meter (76,400 square foot) terminal, of which 962 square meters (approximately 10,350 square feet) are for commercial use. This remodeled area was opened in December 2001.

     In 2004, 2005 and 2006, approximately 19,152, 19,105 and 16,638 metric tons of cargo, respectively, were transported through Merida International Airport, making it our leading airport in terms of cargo volume. In 2004, 2005 and 2006, Merida represented approximately 46.6%, 45.1% and 39.17% respectively, of our total cargo volume. We have considered opportunities for developing the Merida cargo facilities, but we have no plans to pursue such opportunities at this time.

     There is currently one business operating under a long-term lease in Merida International Airport with Grupo de Desarrollo del Sureste, S.A. de C.V. (GDS), which will terminate on January 1, 2009. This lease allows GDS to construct and develop the airport’s air cargo terminal. Our concession provides us the right to collect landing charges and parking charges for aircraft using the cargo terminal.

     In July 2005, we closed our Merida airport for eight hours as a safety precaution in anticipation of Hurricane Emily.

Cozumel International Airport

     Cozumel International Airport is located on the island of Cozumel in the state of Quintana Roo. The airport primarily serves foreign tourists. During 2004, 2005 and 2006, 584,444, 486,616 and 370,712 passengers, respectively, traveled through Cozumel International Airport, most of which were international passengers. Cozumel is the most frequently visited destination for cruise ships in Mexico, hosting approximately 2.5 million and 2.4 million cruise ship visitors in 2005 and 2006, respectively. Cozumel has one of the world’s largest coral reserves, and many passengers traveling to Cozumel are divers. The airport’s most important points of origin and destination are Houston, Dallas and Cancun. The island of Cozumel has a population of approximately 71,000.

     As part of our commercial strategy, at Cozumel International Airport’s main terminal we completed an expansion of 2,218 square meters (approximately 23,900 square feet) and a remodeling of 1,132 square meters (approximately 12,200 square feet) in 2001, giving us a main terminal building with a total of 7,258 square meters (78,100 square feet) of which 610 square meters (6,600 square feet) are for commercial use.

     The airport has a commercial runway with a length of 2,700 meters (1.7 miles). The airport has one main commercial terminal, with four remote boarding positions. The airport also has a general aviation building for small private aircraft.

     On October 21, 2005, Hurricane Wilma struck the Yucatan Peninsula, causing severe damage to the infrastructure of the Cozumel airport. The airport’s power source, as well as its control tower and air navigation systems, were disrupted. Cozumel airport closed on October 21 at approximately 3:00 p.m. and reopened on October 23 at approximately 9:00 a.m. Airport operations did not return to normal for several weeks.

     In July 2005, we temporarily closed the Cozumel airport for 21 hours as a result of Hurricane Emily. In September 2004, we closed Cozumel airport for approximately 36 hours as a safety precaution in anticipation of hurricane Ivan. Approximately 9 flights were cancelled, and no recorded damage or passenger injuries resulted.

Villahermosa International Airport

     Villahermosa International Airport is located in the state of Tabasco, approximately 75 kilometers (46.9 miles) from Palenque, a Mayan archeological site. The city of Villahermosa has a population of approximately 658,000. Oil exploration is the principal business activity in the Villahermosa area, and most of the airport’s passengers are businesspeople working in the oil

industry. During 2004, 2005 and 2006, the airport served 673,313, 717,413 and 725,032 passengers, respectively, substantially all of which arrived on domestic flights. The airport’s most important point of origin and destination is Mexico City.

     The airport has one runway with a length of 2,200 meters (1.4 miles). The airport’s main terminal has six remote parking positions, with three served by boarding bridges.

     As a result of a modernization project carried out in 2006 the airport’s commercial aviation apron was extended by a total of 12,521 square meters (134,634.41 square feet), representing an increase of 87%. The terminal building was expanded from 5,463 square meters (58,741.93 square feet) to 9,678 square meters (104,064.52 square feet), representing an increase of 77%.

Oaxaca International Airport

     Oaxaca International Airport serves the city of Oaxaca, which is the capital of the state of Oaxaca. The city of Oaxaca, located 390 kilometers (243.8 miles) from the Pacific coast, has a population of approximately 511,000. The airport served 543,238, 563,656 and 495,623 passengers in 2004, 2005 and 2006, respectively, most of which were domestic. The airport’s passengers are primarily Mexican businesspeople and tourists, thus its passenger volume and results of operations are dependent on Mexican economic conditions. Oaxaca is a picturesque colonial city located near several tourist attractions, including the archeological ruins of Monte Alban and Mitla. The airport’s most important point of origin and destination is Mexico City.

     The airport has one runway with a length of 2,450 meters (1.5 miles) and a main terminal building with five remote positions. The airport also includes a general aviation building for small private airplanes with 20 positions.

     Ongoing public demonstrations in the city of Oaxaca that began as a teachers’ strike in May 2006 have adversely affected passenger traffic to Oaxaca International Airport. See “Risk Factors—Risks Relating to Mexico.”

Veracruz International Airport

     Veracruz International Airport is located in the city of Veracruz along the Gulf of Mexico. The city of Veracruz has a population of approximately 600,000. Veracruz is the busiest port in Mexico in terms of commercial traffic, and is the location of the country’s largest container terminal. According to the Mexican Bureau of Ports, Veracruz accounted for 13.85% of all waterborne cargo handled by Mexican ports in 2006. In 2004, 2005 and 2006, the airport served 563,511, 579,449 and 717,960 passengers, respectively. Because the airport’s passengers are primarily Mexican business people, its passenger volume and results of operations are dependent on Mexican economic conditions. The airport’s most important point of origin and destination is Mexico City.

     The airport has two perpendicular runways, one with a length of 2,400 meters (1.5 miles) and another with a length of 1,523 meters (1.0 miles). The airport has one main commercial terminal. The airport also has a general aviation building for small private aircraft with 23 positions.

     The original 4,065 square meters (43,700 square feet) of the terminal building at the airport were remodeled in 2005, and an extension of 2,000 square meters (21,500 square feet) was added, representing an increase of 49%. In addition, special collapsible jetways were built to protect passengers during boarding and disembarking, along with a new international baggage reclaim facility and bigger, newer offices and facilities for federal authorities.

Huatulco International Airport

     Huatulco International Airport serves the Huatulco resort area in the state of Oaxaca on Mexico’s Pacific coast. Huatulco has a population of approximately 14,000, and was developed as a tourist resort in the late 1980s. The airport served 270,757, 312,055 and 375,276 passengers in 2004, 2005 and 2006, respectively, most of which were domestic. The substantial majority of the airport’s passengers are international tourists, although many arrive through domestic flights and are thus classified as domestic. The airport’s most important points of origin and destination are Mexico City, Monterrey and Oaxaca.

     The airport has one runway with a length of 2,700 meters (1.7 miles). The airport’s main terminal has three remote positions. The airport has a general aviation building for small private airplanes with 8 positions.

Tapachula International Airport

     Tapachula International Airport serves the city of Tapachula, which has a population of approximately 199,000 and is located in the state of Chiapas. In 2004, 2005 and 2006, the airport served 193,573, 192,326 and 188,053passengers, respectively, substantially all of which were domestic. The airport’s passenger volume and results of operations are dependent on Mexican economic conditions since virtually all of its passengers are domestic. The airport’s most important point of origin and destination is Mexico City.

     The airport has one runway with a length of 2,000 meters (1.3 miles). The airport has one main terminal with three remote boarding positions. The airport also has a general aviation building for small private aircraft with 24 boarding positions.

Minatitlan Airport

     Minatitlan Airport is located near the Gulf of Mexico, 13 kilometers (8.1 miles) from the city of Coatzacoalcos, 11 kilometers (6.9 miles) from the city of Cosoleacaque and 26 kilometers (16.2 miles) from the city of Minatitlan. The metropolitan area comprised of these three cities has a population of approximately 541,000. In 2004, 2005 and 2006, the airport served 126,497, 146,485 and 171,890 passengers, respectively. In recent years, the airport’s passenger traffic has decreased due to lower oil and petrochemical industry activity in Coatzacoalcos and Cosoleacaque. The airport’s passengers are principally domestic business people drawn by the area’s petrochemical and agriculture businesses. Because the airport’s passengers are primarily Mexican travelers, its passenger volume and results of operations are dependent on Mexican economic conditions. The airport’s most important point of origin and destination is Mexico City.

     On August 21, 2006, the Ministry of Communications and Transportation declared Minatitlan Airport an international airport. As of today, we are exploring the possibility of commencing international operations there.

     The airport has one runway with a length of 2,100 meters (1.3 miles). The airport’s main terminal has three remote parking positions. The airport has a general aviation building for small private airplanes with 30 boarding positions.

Principal Air Traffic Customers

     As of December 31, 2006, 104 international airlines and 18 Mexican airlines operated flights at our nine airports (including airlines operating in the charter terminal in Cancun International Airport and airlines operating solely on a code share basis). A code share arrangement means that airlines that do not fly their own aircraft into our airports arrange to share the passenger space in another airline’s aircraft, with both airlines booking passengers through the same code.

     Grupo Mexicana, whose subsidiaries include Mexicana and Click Mexicana (formerly known as Aerocaribe), operates the most flights at our airports, with Grupo Aeromexico providing the second highest number of flights. Grupo Mexicana is owned by Grupo Posadas, S.A. de C.V., the largest hotel operator in Mexico, one of whose board members is our Chairman and CEO, Fernando Chico Pardo. Grupo Aeromexico and Grupo Mexicana also control other airlines operating in our airports, including Aerocozumel and Aeromexpress, as well as the largest provider of baggage and ramp handling services at our airports, Servicios de Apoyo en Tierra, or SEAT.

     Among foreign airlines, American Airlines and Continental Airlines operate the greatest number of flights to and from our airports. In 2004, American Airlines and Continental Airlines accounted for 6.8% and 5.4%, respectively, of our total revenues. In 2005, American Airlines and Continental Airlines accounted for 6.1% and 5.1%, respectively, of our total revenues. In 2006, American Airlines and Continental Airlines accounted for 5.8% and 4.7%, respectively, of our revenues.

     The following table sets forth our principal air traffic customers based on the percentage of revenues they represented for the years ended December 31, 2004, 2005 and 2006:

Principal Air Traffic Customers

		Percentage of ASUR Revenues
		Year ended December 31,
		2004				2005				2006
Customer
Compania Mexicana de Aviacion, S.A. de C.V. (Mexicana)			9.6	%			10.4	%			9.1	%
American Airlines			6.8	%			6.1	%			5.8	%
Aerovias de Mexico, S.A. de C.V. (Aeromexico)			6.2	%			5.1	%			5.9	%
Continental Airlines			5.4	%			5.1	%			4.7	%
Aerovias Caribe, S.A. de C.V. (Click)			3.3	%			3.3	%			3.5	%
Aviation Support S.A. de C.V.			2.0	%			2.2	%			2.9	%
Aviacion Comercial Especializada S.A. de C.V.			4.0	%			3.8	%			3.0	%
Comercializadora de Productos en Aeropuertos			0	%			0.3	%			0.0	%
Consorcio Aviacsa, S.A. de C.V.			3.6	%			4.3	%			4.2	%
American Trans Air			1.3	%			1.1	%			0.0	%
Petroservicios de Mexico, S.A. de C.V.			2.5	%			2.1	%			0.5	%
Other			55.3	%			56.2	%			60.4	%
Total			100.0	%			100	%			100.	%

Seasonality

     Our business is subject to seasonal fluctuations. In general, demand for air travel is typically higher during the summer months and during the winter holiday season, particularly in international markets, because there is more vacation travel during these periods. Our results of operations generally reflect this seasonality, but have also been impacted by numerous other factors that are not necessarily seasonal, including economic conditions, war or threat of war, weather, air traffic control delays and general economic conditions, as well as the other factors discussed above. As a result, our operating results for a quarterly period are not necessarily indicative of operating results for an entire year, and historical operating results are not necessarily indicative of future operating results.

Competition

     Since our business is substantially dependent on international tourists, our principal competition is from competing tourist destinations. We believe that the main competitors to Cancun are vacation destinations in Mexico, such as Acapulco, Puerto Vallarta and Los Cabos, and elsewhere such as Puerto Rico, Florida, Cuba, Jamaica, the Dominican Republic and other Caribbean island and Central American resorts. In March 2000, a new airport opened in Chichen Itza. This airport is operated by the former operator of the charter terminal in Cancun Airport. In addition, the Mexican government has announced its intention, at some point in the future, to grant a concession for a new airport in the Mayan Riviera through a public bidding process. In October 2004, the Mexican state of Quintana Roo formed a majority state-owned company, Aeropuerto Internacional de la Riviera Maya, S.A. de C.V., to seek any such concession that may be granted. Currently, the Mayan Riviera is served primarily by Cancun Airport. ASUR has no further details on the construction or projected opening of the airport and is unable to predict the effect that it may have on our passenger traffic or operating results if the project is successfully carried out.

     The relative attractiveness of the locations we serve is dependent on many factors, some of which are beyond our control. These factors include promotional activities and pricing policies of hotel and resort operators, weather conditions, natural disasters (such as hurricanes) and the development of new resorts that may be considered more attractive. There can be no assurance that the locations we serve will continue to attract the same level of passenger traffic in the future.

     Excluding Cancun Airport, our airports generally do not face significant competition. The Mexican Airport and Auxiliary Services Agency currently operates seven small airports in Mexico’s southeast region. The Mexican Airport and Auxiliary Services Agency estimates that its airports collectively account for less than 10% of the passenger traffic in the region.

REGULATORY FRAMEWORK

Sources of Regulation

     The following are the principal laws, regulations and instruments that govern our business and the operation of our airports:

•		the Mexican Airport Law, enacted December 22, 1995,
•		the regulations to the Mexican Airport Law, enacted February 17, 2000,
•		the Mexican Communications Law, enacted February 19, 1940,
•		the Mexican Civil Aviation Law, enacted May 12, 1995,
•		the Mexican Federal Duties Law, enacted December 31, 1981,
•		the Mexican National Assets Law, enacted May 20, 2004, and
•		the concessions that entitle our subsidiaries to operate our nine airports, which were granted in 1998 and amended in 1999.

     The Mexican Airport Law and the regulations to the Mexican Airport Law establish the general framework regulating the construction, operation, maintenance and development of Mexican airport facilities. The Mexican Airport Law’s stated intent is to promote the expansion, development and modernization of Mexico’s airport infrastructure by encouraging investment and competition.

     Under the Mexican Airport Law, a concession granted by the Ministry of Communications and Transportation is required to construct, operate, maintain or develop a public service airport in Mexico. A concession generally must be granted pursuant to a public bidding process, except for: (i) concessions granted to (a) entities considered part of “the federal public administration” as defined under Mexican law and (b) private companies whose principal stockholder may be a state or municipal government; (ii) concessions granted to operators of private airports (who have operated privately for five or more years) wishing to begin operating their facilities as public service airports; and (iii) complementary concessions granted to existing concession holders. Complementary concessions may be granted only under certain limited circumstances, such as where an existing concession holder can demonstrate, among other things, that the award of the complementary concession is necessary to satisfy passenger demand. In 1998, the Ministry of Communications and Transportation granted nine concessions to operate, maintain and develop the nine principal airports in Mexico’s southeast region to our subsidiaries. Because our subsidiaries were considered entities of the federal public administration at the time the concessions were granted, the concessions were awarded without a public bidding process. Each of our concessions was amended on March 19, 1999 in order, among other things, to incorporate each airport’s maximum rates and certain other terms as part of the concession.

     The Mexican National Assets Law among other items establishes regulations relating to concessions on real property held in the public domain, including the airports that we operate. The Mexican National Assets Law requires concessionaires of real property held in the public domain that are used for administrative or other non-public purposes to pay a tax. In addition, the Mexican National Assets Law establishes grounds for revocation of concessions for failure to pay this tax.

     To our knowledge, the constitutionality of the Mexican National Assets Law has not been challenged in Mexico’s court system. If challenged in the future, a court could declare the tax void or determine an alternate amount. We do not expect this tax to materially affect our results of operations or financial condition.

     On February 17, 2000 the regulations to the Mexican Airport Law were issued. Although we believe we are currently complying with the principal requirements of the Mexican Airport Law and its regulations, we are not in compliance with certain requirements under the regulations. These violations could result in fines or other sanctions being assessed by the Ministry of Communications and Transportation, and are among the violations that could result in termination of a concession if they occur three or more times.

Role of the Ministry of Communications and Transportation

     The Ministry of Communications and Transportation is the principal regulator of airports in Mexico and is authorized by the Mexican Airport Law to perform the following functions:

•		grant, modify and revoke concessions for the operation of airports,
•		establish air transit rules and rules regulating take-off and landing schedules through the Mexican air traffic control authority,
•		take all necessary action to create an efficient, competitive and non-discriminatory market for airport-related services,
•		approve any transaction or transactions that directly or indirectly may result in a change of control of a concession holder,
•		approve the master development plans prepared by each concession holder every five years,
•		determine each airport’s maximum rates,
•		approve any agreements entered into between a concession holder and a third party providing airport or complementary services at its airport,
•		establish safety regulations,
•		monitor airport facilities to determine their compliance with the Mexican Airport Law, other applicable laws and the terms of the concessions, and

•

impose penalties for failure to observe and perform the rules under the Mexican Airport Law, the Mexican Airport Law regulations and the concessions.

     In addition, under the Mexican Organic Law of the Federal Public Administration, the Mexican Airport Law and the Mexican Civil Aviation Law, the Ministry of Communications and Transportation is required to provide air traffic control, radio assistance and aeronautical communications at Mexico’s airports. The Ministry of Communications and Transportation provides these services through SENEAM, the Mexican air traffic control authority, which is a division of the Ministry of Communications and Transportation. Since 1978, the Mexican air traffic control authority has provided air traffic control for Mexico’s airports.

New Regulatory Agency

     The Ministry of Communications and Transportation has announced that it intends to establish a new regulatory agency. This new agency is expected to be authorized to monitor our activities and those of the other new airport groups, to enforce applicable regulations and to propose amendments to concessions, to set maximum rates, to resolve disputes between concession holders and airport users (such as airlines) and to collect and distribute information relating to the airport sector. No date for the establishment of this new regulatory agency has been publicly announced.

Scope of Concessions and General Obligations of Concession Holders

     As authorized under the Mexican Airport Law, each of the concessions held by our subsidiaries is for an initial 50-year term from November 1, 1998. This initial term of each of our concessions may be renewed in one or more terms for up to an additional 50 years, subject to the concession holder’s acceptance of any new conditions imposed by the Ministry of Communications and Transportation and to its compliance with the terms of its concession.

     The concessions held by our subsidiary concession holders allow the relevant concession holder, during the term of the concession, to: (i) operate, maintain and develop its airport and carry out any necessary construction in order to render airport, complementary and commercial services as provided under the Mexican Airport Law and the Mexican Airport Law regulations; and (ii) use and develop the assets that comprise the airport that is the subject of the concession (consisting of the airport’s real estate and improvements but excluding assets used in connection with fuel supply and storage). These assets are government-owned assets, subject to the Mexican National Assets Law. Upon expiration of a concession, these assets automatically revert to the Mexican government.

     Substantially all of contracts entered into by the Mexican Airport and Auxiliary Services Agency with respect to each of our airports have been assigned to the relevant concession holder for each airport. As part of this assignment, each concession holder agreed to indemnify the Mexican Airport and Auxiliary Services Agency for any loss suffered by the Mexican Airport and Auxiliary Services Agency due to the concession holder’s breach of its obligations under an assigned agreement.

     Under the Mexican Federal Duties Law, each of our subsidiary concession holders is required to pay the Mexican government a concession fee based on its gross annual revenues

from the use of public domain assets pursuant to the terms of its concession. Currently, this concession fee is set at a rate of 5% and may be revised annually by the Mexican Congress. Our concessions provide that we may request an amendment of our maximum rates if there is a change in this concession fee.

     Concession holders are required to provide airport security. If public order or national security is endangered, the competent federal authorities are authorized to act to protect the safety of aircraft, passengers, cargo, mail, installations and equipment.

     Each concession holder and any third party providing services at an airport is required to carry specified insurance in amounts and covering specified risks, such as damage to persons and property at the airport, in each case as specified by the Ministry of Communications and Transportation. To date the Ministry of Communications and Transportation has not specified the required amounts of insurance. We cannot assure you that we will not be required to obtain additional insurance once these amounts are specified.

     ASUR and our subsidiary concession holders are jointly and severally liable to the Ministry of Communications and Transportation for the performance of all obligations under the concessions held by our subsidiaries. Each of our subsidiary concession holders is responsible for the performance of the obligations set forth in its concession, including the obligations arising from third-party contracts, as well as for any damages to the Mexican government-owned assets which they use and to third-party airport users. In the event of a breach of one concession, the Ministry of Communications and Transportation is authorized to revoke all of the concessions held by our subsidiaries.

     The shares of a concession holder and the rights under a concession may be subject to a lien only with the approval of the Ministry of Communications and Transportation. No agreement documenting liens approved by the Ministry of Communications and Transportation may allow the beneficiary of a pledge to become a concession holder under any circumstances.

     A concession holder may not assign any of its rights or obligations under its concession without the authorization of the Ministry of Communications and Transportation. The Ministry of Communications and Transportation is authorized to consent to an assignment only if the proposed assignee satisfies the requirements to be a concession holder under the Mexican Airport Law, undertakes to comply with the obligations under the relevant concession and agrees to any other conditions that the Ministry may require.

Classification of Services Provided at Airports

     The Mexican Airport Law and the Mexican Airport Law regulations classify the services that may be rendered at an airport into the following three categories:

•

Airport Services. Airport services may be rendered only by the holder of a concession or a third party that has entered into an agreement with the concession holder to provide such services. These services include: —the use of airport runways, taxiways and aprons for landing, aircraft parking and departure, —the use of hangars, passenger walkways, transport buses and automobile parking facilities, —the provision of airport security services, rescue and firefighting services, ground traffic control, lighting and visual aids, —the general use of

		terminal space and other infrastructure by aircraft, passengers and cargo, and —the provision of access to an airport to third parties providing complementary services (as defined in the Mexican Airport Law) and third parties providing permanent ground transport services (such as taxis).
•		Complementary Services. Complementary services may be rendered by an airline, by the airport operator or by a third party under agreements with airlines or the airport operator. These services include: —ramp and handling services, —passenger check-in, and —aircraft security, catering, cleaning, maintenance, repair and fuel supply and related activities that provide support to air carriers.
•		Commercial Services. Commercial services involve services that are not considered essential to the operation of an airport or aircraft, and include: —the leasing of space to retailers, restaurants and banks, and —advertising.

     Third parties rendering airport, complementary or commercial services are required to do so pursuant to a written agreement with the relevant concession holder. All agreements relating to airport or complementary services are required to be approved by the Ministry of Communications and Transportation. The Mexican Airport Law provides that the concession holder is jointly liable with these third parties for compliance with the terms of the relevant concession with respect to the services provided by such third parties. All third-party service providers of complementary services are required to be corporations incorporated under Mexican law.

     Airport and complementary services are required to be provided to all users in a uniform and regular manner, without discrimination as to quality, access or price. Concession holders are required to provide airport and complementary services on a priority basis to military aircraft, disaster support aircraft and aircraft experiencing emergencies. Airport and complementary services are required to be provided at no cost to military aircraft and aircraft performing national security activities.

     In the event of force majeure, the Ministry of Communications and Transportation may impose additional regulations governing the provision of services at airports, but only to the extent necessary to address the force majeure event. The Mexican Airport Law allows the airport administrator appointed by a concession holder to suspend the provision of airport services in the event of force majeure.

     A concession holder is also required to take all necessary measures to create a competitive market for complementary services. Due to space, efficiency and safety considerations, a concession holder may limit the number of providers of complementary services in its airport. If the number of complementary service providers must be limited due to these considerations, contracts for the provision of complementary services must be awarded through a competitive bidding process.

Master Development Plans

     Concession holders are also required to submit to the Ministry of Communications and Transportation a master development plan describing, among other things, the concession holder’s construction and maintenance plans.

     Each master development plan is for a fifteen-year period and is required to be updated every five years and resubmitted for approval to the Ministry of Communications and Transportation. Upon such approval, the master development plan is deemed to constitute a part of the relevant concession. Any major construction, renovation or expansion of an airport may only be made pursuant to a concession holder’s master development plan or upon approval by the Ministry of Communications and Transportation. Information required to be presented in the master development plan includes:

•		airport growth and development expectancies,
•		15-year projections for air traffic demand (including passenger, cargo and operations),
•		construction, conservation, maintenance, expansion and modernization programs for infrastructure, facilities and equipment,
•		five-year detailed investment program and planned major investments for the following ten years,
•		probable sources of financing,
•		descriptive airport plans, and
•		environmental protection measures.

     The concessions require the concession holder to engage recognized independent consultants to conduct polls among airport users with respect to current and expected quality standards, and to prepare air traffic projections and investment requirements. The concession holder must submit a draft of the master development plan to airport users for their review and comments. Further, the concession holder must submit the master development plan to the Ministry of Communications and Transportation prior to the expiration of the five-year term. The Ministry of Communications and Transportation may request additional information or clarification as well as seek further comments from airport users.

     Changes to a master development plan and investment program require the approval of the Ministry of Communications and Transportation, except for emergency repairs and minor works that do not adversely affect an airport’s operations.

     On December 30, 2003, the Ministry of Communications and Transportation approved our current master development plans. The current terms of the updated master development plans went into effect on January 1, 2004, and will be in effect until December 31, 2008.

     The following table sets forth our committed investments for each airport pursuant to the terms of our current master development plans for the periods presented. Even though we have committed to invest the amounts in the table, those amounts could be lower or higher depending on the cost of each project.

Committed Investments

		Year ended December 31,
		2004				2005				2006				2007				2008				Total
		(thousands of pesos)(1)
Cancun(2)		Ps.	334,960			Ps.	432,206			Ps.	847,797			Ps.	1,052,919			Ps.	83,298			Ps.	2,751,180
Merida			25,184				27,710				46,255				31,188				2,321				132,658
Cozumel			10,598				68,984				12,442				16,280				10,828				119,132
Villahermosa			47,407				63,602				6,360				11,892				1,303				130,564
Oaxaca			21,502				21,150				10,257				6,624				4,829				64,362
Veracruz			25,161				21,287				11,616				11,205				1,496				70,765
Huatulco			9,820				5,450				3,990				6,816				52,560				78,636
Tapachula			20,202				4,447				9,217				8,158				801				42,825
Minatitlan			10,559				6,156				4,838				2,023				3,062				26,638
Total		Ps.	505,393			Ps.	650,992			Ps.	952,772			Ps.	1,147,105			Ps.	160,498			Ps.	3,416,760

Price Regulation

     The Mexican Airport Law provides that the Ministry of Communications and Transportation may establish price regulations for services for which the Antitrust Commission determines that a competitive market does not exist. On March 9, 1999, the Antitrust Commission issued a ruling stating that competitive markets generally do not exist for airport services and airport access provided to third parties rendering complementary services. This ruling authorized the Ministry of Communications and Transportation to establish regulations governing the prices that may be charged for airport services and access fees that may be charged to providers of complementary services in our airports. On March 19, 1999, a new regulation, the Rate Regulation, was incorporated within the terms of each of our concessions. The Rate Regulation, which became effective May 1, 1999, establishes the annual maximum rates for each of our concession holders, which is the maximum amount of revenue per work load unit (one passenger or 100 kilograms (220 pounds) of cargo) in a given year that the concession holder may earn at its airports from all regulated revenue sources.

Regulated Revenues

     The Rate Regulation establishes a “dual-till” system of price regulation under which certain of our revenues, such as passenger charges, landing charges, aircraft parking charges and access fees from third parties providing complementary services at our airports, are regulated, while the revenues that we earn from commercial activities in our terminals, such as the leasing of space to duty-free stores, retailers, restaurants, car rental companies and banks, are not regulated.

     The Rate Regulation provides that the following sources of revenues are regulated under this “dual-till” system:

•		revenues from airport services (as defined under the Mexican Airport Law), other than automobile parking, and
•		access fees earned from third parties providing complementary services, other than those related to the establishment of administrative quarters that the Ministry of Communications and Transportation determines to be non-essential.

     All other sources of revenues at our airports are not regulated. Approximately 78.8%, 74.6% and 74.7% of our revenues in 2004, 2005 and 2006, respectively, were derived from regulated sources of revenue.

     Each concession holder is entitled to determine the prices charged for each regulated service and is required to register such prices with the Ministry of Communications and Transportation. Once registered, those prices are deemed part of its concession, and may only be changed every six months or earlier if there has been a cumulative increase of at least 5% in the Mexican producer price index (excluding petroleum) as published by the Mexican Central Bank since the date of the last adjustment and in other specific circumstances. See “—Special Adjustments to Maximum Rates.”

Current Maximum Rates

     Each airport’s maximum rates from January 1, 2004 to December 31, 2008 were set by the Ministry of Communications and Transportation in December 2003.

     The following table sets forth the maximum rates for each of our airports for the periods indicated. These maximum rates are subject to adjustment only under the limited circumstances described below under “Special Adjustments to Maximum Rates.”

		Maximum Rates(1)(2)
		Year ended December 31,
		2004				2005				2006				2007				2008
Cancun		Ps.	125.34			Ps.	124.40			Ps	123.46			Ps.	122.53			Ps.	121.61
Merida			94.46				93.75				93.05				92.36				91.67
Cozumel			134.48				133.47				132.46				131.47				130.49
Villahermosa			109.44				108.60				107.80				106.99				106.19
Oaxaca			115.39				114.51				113.65				112.80				111.96
Veracruz			98.01				97.27				96.53				95.82				95.09
Huatulco			110.85				110.03				96.61				108.38				107.57
Tapachula			137.85				136.82				135.80				134.78				133.77
Minatitlan			117.49				116.62				115.74				114.87				114.01

Methodology For Determining Future Maximum Rates

     The Rate Regulation provides that each airport’s annual maximum rates are to be determined in five-year intervals based on the following variables:

•		Projections for the fifteen-year period of work load units (each of which is equivalent to one passenger or 100 kilograms (220 pounds) of cargo), operating costs and expenses (excluding amortization and depreciation) related to services subject to price regulation.
•		Projections for the fifteen-year period of capital expenditures related to regulated services, based on air traffic forecasts and quality of standards for services to be derived from the master development plans.
•		Reference values, which were established in the concessions and are designed to reflect the net present value of the regulated revenues minus the corresponding regulated operating costs and expenses (excluding amortization and depreciation), and capital expenditures related to the provision of regulated services plus a terminal value.
•		A discount rate to be determined by the Ministry of Communications and Transportation. The concessions provide that the discount rate shall reflect the cost of capital to Mexican and international companies in the airport industry (on a pre-tax basis), as well as Mexican economic conditions. The concessions provide that the discount rate shall be at least equal to the average yield of long-term Mexican government debt securities quoted in the international markets during the prior 24 months plus a risk premium to be determined by the Ministry of Communications and Transportation based on the inherent risk of the airport business in Mexico.

     Our concessions specify a discounted cash flow formula to be used to determine the maximum rates that, given the projected pre-tax earnings, capital expenditures and discount rate, would result in a net present value equal to the reference values established in connection with the last determination of maximum rates.

     Our concessions provide that each airport’s maximum rate may be adjusted annually to take account of projected improvements in efficiency. For the five-year period ending December 31, 2008, the maximum rates applicable to our airports reflect a projected annual efficiency improvement of 0.75%.

     The concessions provide that each airport’s reference values, discount rate and the other variables used in calculating the maximum rates are not guarantees and do not in any manner represent an undertaking by the Ministry of Communications and Transportation or the Mexican government as to the performance of any concession holder. To the extent that the revenues from services subject to price regulation in any period are less than an airport’s maximum rate multiplied by the work load units processed for such period, no adjustment will be made to compensate for this shortfall.

     To the extent that such aggregate revenues per work load unit exceed the relevant maximum rate, the Ministry of Communications and Transportation may proportionately reduce the maximum rate in the immediately subsequent year and assess penalties equivalent to 1,000 to

50,000 times the general minimum wage in the Federal District (Mexico City). On January 1, 2007, the daily minimum wage in Mexico City was Ps. 50.57. As a result, the maximum penalty at such date could have been Ps. 2.5 million (U.S.$233,869). In the event that a concession holder fails to comply with certain terms of its concession, or violates certain other terms of its concession after having been sanctioned at least three times for violation of that concession, the Ministry of Communications and Transportation is entitled to revoke its concession. We would face similar sanctions for any violations of the Mexican Airport Law or its regulations. A full discussion of circumstances that might lead to a revocation of a concession may be found below at “Penalties and Termination and Revocation of Concessions and Concession Assets.”

     Currently, our calculation of work load units (one passenger or 100 kilograms (220 pounds) of cargo does not include transit passengers. There is a possibility that in the future our work load units may include transit passengers and the Ministry of Communications and Transportation will decrease our maximum rates to reflect this higher passenger base. Although there can be no assurance, we do not expect this change to occur in the short term or have a material adverse effect on our revenues if and when it happens.

Special Adjustments to Maximum Rates

     Once determined, each airport’s maximum rates are subject to special adjustment only under the following circumstances:

•		Change in law or natural disasters. A concession holder may request an adjustment in its maximum rates if a change in law with respect to quality standards or safety and environmental protection results in operating costs or capital expenditures that were not contemplated when its maximum rates were determined. In addition, a concession holder may also request an adjustment in its maximum rates if a natural disaster affects demand or requires unanticipated capital expenditures. There can be no assurance that any request on these grounds would be approved, or that we would make such a request.
•		Macroeconomic conditions. A concession holder may also request an adjustment in its maximum rates if, as a result of a decrease of at least 5% in Mexican gross domestic product in a 12-month period, the work load units processed in the concession holder’s airport are less than that projected when its maximum rates were determined. To grant an adjustment under these circumstances, the Ministry of Communications and Transportation must have already allowed the concession holder to decrease its projected capital improvements as a result of the decline in passenger traffic volume. There can be no assurance that any request on these grounds would be approved, or that we would make such a request.
•		Increase in concession fee under Mexican Federal Duties Law. An increase in duty payable by a concession holder under the Mexican Federal Duties Law entitles the concession holder to request an adjustment in its maximum rates. There can be no assurance that any request on these grounds would be approved.
•		Failure to make required investments or improvements. The Ministry of Communications and Transportation annually is required to review each concession holder’s compliance with its master development plan (including the provision of services and the making of capital

		investments). If a concession holder fails to satisfy any of the investment commitments contained in its master development plan, the Ministry of Communications and Transportation is entitled to decrease the concession holder’s maximum rates and assess penalties.
•		Excess revenues. In the event that revenues subject to price regulation per work load unit in any year exceed the applicable maximum rate, the maximum rate for the following year will be decreased to compensate airport users for overpayment in the previous year. Under these circumstances, the Ministry of Communications and Transportation is also entitled to assess penalties against the concession holder.

Ownership Commitments and Restrictions

     The concessions require us to retain a 51% direct ownership interest in each of our nine concession holders throughout the term of these concessions. Any acquisition by us or one of our concession holders of any additional airport concessions or of a beneficial interest of 30% or more of another concession holder requires the consent of the Antitrust Commission. In addition, the concessions prohibit us and our concession holders, collectively or individually, from acquiring more than one concession for the operation of an airport along each of Mexico’s southern and northern borders.

     Air carriers are prohibited under the Mexican Airport Law from controlling or beneficially owning 5% or more of the shares of a holder of an airport concession. We, and each of our subsidiaries, are similarly restricted from owning 5% or more of the shares of any air carrier.

     Foreign governments acting in a sovereign capacity are prohibited from owning any direct or indirect equity interest in a holder of an airport concession.

Reporting, Information and Consent Requirements

     Concession holders and third parties providing services at airports are required to provide the Ministry of Communications and Transportation access to all airport facilities and information relating to an airport’s construction, operation, maintenance and development. Each concession holder is obligated to maintain statistical records of operations and air traffic movements in its airport and to provide the Ministry of Communications and Transportation with any information that it may request. Each concession holder is also required to publish its annual audited consolidated financial statements in a principal Mexican newspaper within the first four months of each year.

     The Mexican Airport Law provides that any person or group directly or indirectly acquiring control of a concession holder is required to obtain the consent of the Ministry of Communications and Transportation to such control acquisition. For purposes of this requirement, control is deemed to be acquired in the following circumstances:

•

if a person acquires 35% or more of the shares of a concession holder,

•		if a person has the ability to control the outcome of meetings of the stockholders of a concession holder,
•		if a person has the ability to appoint a majority of the members of the board of directors of a concession holder, and
•		if a person by any other means acquires control of an airport.

     Under the regulations to the Mexican Airport Law, any company acquiring control of a concession holder is deemed to be jointly and severally liable with the concession holder for the performance of the terms and conditions of the concession.

     The Ministry of Communications and Transportation is required to be notified upon any change in a concession holder’s chief executive officer, board of directors or management. A concession holder is also required to notify the Ministry of Communications and Transportation at least 90 days prior to the adoption of any amendment to its bylaws concerning the dissolution, corporate purpose, merger, transformation or spin-off of the concession holder.

Penalties and Termination and Revocation of Concessions and Concession Assets

     The Mexican Airport Law provides that sanctions of up to 400,000 times the minimum daily wage in the Federal District (Mexico City) may be assessed for failures to comply with the terms of a concession. On January 1, 2007, the daily minimum wage in Mexico City was Ps. 50.57. As a result, the maximum penalty at such date could have been Ps. 20.2 million (U.S.$1.87 million).

     Under the Mexican Airport Law and the terms of the concessions, a concession may be terminated upon any of the following events:

•		expiration of its term,
•		surrender by the concession holder,
•		revocation of the concession by the Ministry of Communications and Transportation,
•		reversion (rescate) of the Mexican government-owned assets that are the subject of the concession (principally real estate, improvements and other infrastructure),
•		inability to achieve the purpose of the concession, except in the event of force majeure, or
•		dissolution, liquidation or bankruptcy of the concession holder.

     The Mexican National Assets Law, published in the Diario Oficial de la Federacion on May 20, 2004, among other items, establishes regulations relating to concessions on real

property held in the public domain, including the airports that we operate. The Mexican National Assets Law requires concessionaires of real property held in the public domain that are used for administrative or other non-public purposes to pay a tax. In addition, the Mexican National Assets Law establishes new grounds for revocation of concessions for failure to pay this tax.

     A concession’s termination does not exempt the concession holder from liability in connection with the obligations acquired during the term of the concession.

     Upon termination, whether as a result of expiration or revocation, the public domain assets (including real estate and fixtures) that were the subject of the concession automatically revert to the Mexican government at no cost. In addition, upon termination the Mexican federal government has a preemptive right to acquire privately owned assets used by the concession holder to provide services under the concession at prices determined by expert appraisers appointed by the Ministry of Communications and Transportation. Alternatively, the Mexican government may elect to lease these assets for up to five years at fair market rates as determined by expert appraisers appointed by the Mexican government and the concession holder. In the event of a discrepancy between appraisals, a third expert appraiser must be jointly appointed by the Mexican government and the concession holder. If the concession holder does not appoint an expert appraiser, or if such appraiser fails to determine a price, the determination of the appraiser appointed by the Mexican government will be conclusive. If the Mexican government chooses to lease the assets, it may thereafter purchase the assets at their fair market value, as determined by an expert appraiser jointly appointed by the Mexican government and the concession holder.

     A concession may be revoked by the Ministry of Communications and Transportation under certain conditions, including:

•		the failure by a concession holder to begin operating, maintaining and developing an airport pursuant to the terms established in the concession,
•		the failure by a concession holder to maintain insurance as required under the Mexican Airport Law,
•		the assignment, encumbrance, transfer or sale of a concession, any of the rights thereunder or the assets underlying the concession in violation of the Mexican Airport Law,
•		any alteration of the nature or condition of an airport’s facilities without the authorization of the Ministry of Communications and Transportation,
•		consent to the use, or without the approval of air traffic control authorities, of an airport by any aircraft that does not comply with the requirements of the Mexican Civil Aviation Law, that has not been authorized by the Mexican air traffic control authority, or that is involved in the commission of a felony,
•		knowingly appointing or maintaining a chief executive officer or board member of a concession holder that is not qualified to perform his functions under the law as a result of having violated criminal laws,

•		a violation of the safety regulations established in the Mexican Airport Law and other applicable laws,
•		a total or partial interruption of the operation of an airport or its airport or complementary services without justified cause,
•		the failure of ASUR to own at least 51% of the capital stock of its subsidiary concession holders,
•		the failure to maintain the airport’s facilities,
•		the provision of unauthorized services,
•		the failure to indemnify a third party for damages caused by the provision of services by the concession holder or a third-party service provider,
•		charging prices higher than those registered with the Ministry of Communications and Transportation for regulated services or exceeding the applicable maximum rate,
•		any act or omission that impedes the ability of other service providers or authorities to carry out their functions within the airport, or
•		any other failure to comply with the Mexican Airport Law, its regulations and the terms of a concession.

     The Ministry of Communications and Transportation is entitled to revoke a concession without prior notice as a result of the first six events described above. In the case of other violations, a concession may be revoked as a result of a violation only if sanctions have been imposed at least three times with respect to the same violation.

     According to the Mexican National Assets Law, Mexico’s national patrimony consists of private and government-owned assets of the Federation. The surface area of our airports and improvements on such space are considered government-owned assets. A concession concerning government-owned assets may be reverted to the Mexican government prior to the concession’s expiration, when considered necessary for the public interest. In exchange, the Mexican government is required to pay compensation, taking into consideration investments made and depreciation of the relevant assets, but not the value of the assets subject to the concessions, based on the basis and methodology set forth in the reversion (rescate) resolutions issued by the Ministry of Communications and Transportation. Following a declaration of reversion, the assets that were subject to the concession are automatically returned to the Mexican government.

     In the event of war, natural disaster, grave disruption of the public order or an imminent threat to national security, internal peace or the economy, the Mexican government may carry out a requisition (requisa — step-in rights) with respect to our airports. The step-in rights may be exercised by the Mexican government as long as the circumstances warrant. In all cases, except international war, the Mexican government is required to indemnify us for damages and lost profits (daños y perjuicios) caused by such requisition, calculated at their real value (valor real); provided that if we were to contest the amount of such indemnification, the amount of the

indemnity with respect to damages (daños) shall be fixed by expert appraisers appointed by us and the Mexican government, and the amount of the indemnity with respect to lost profits (perjuicios) shall be calculated taking into consideration the average net income during the year immediately prior to the requisition. In the event of requisition due to international war, the Mexican government would not be obligated to indemnify us.

Grants of New Concessions

     The Mexican government may grant new concessions to manage, operate, develop and construct airports. Such concessions may be granted through a public bidding process in which bidders must demonstrate their technical, legal, managerial and financial capabilities. In addition, the government may grant concessions without a public bidding process to the following entities:

	•		parties who hold permits to operate civil aerodromes and intend to transform the aerodrome into an airport so long as (i) the proposed change is consistent with the national airport development programs and policies, (ii) the civil aerodrome has been in continuous operation for the previous 5 years and (iii) the permit holder complies with all requirements of the concession,
	•		current concession holders when necessary to meet increased demand so long as (i) a new airport is necessary to increase existing capacity, (ii) the operation of both airports by a single concession holder is more efficient than other options, and (iii) the concession holder complies with all requirements of the concession,
	•		current concession holders when it is in the public interest for their airport to be relocated,
	•		entities in the federal public administration, and
	•		commercial entities in which local or municipal governments have a majority equity interest if the entities’ corporate purpose is to manage, operate, develop and/or construct airports.

Environmental Matters

     Our operations are subject to Mexican federal and state laws and regulations relating to the protection of the environment. The principal environmental laws include the General Law of Ecological Balance and Environmental Protection, or the Ecological Law, which is administered by the Federal Attorney’s Office for the Protection of the Environment, the enforcement arm of the Ministry of the Environment, Natural Resources and Fishing, and the Law of National Waters and its regulations, which are administered by the National Water Commission. Under the Ecological Law, regulations have been promulgated concerning air pollution, environmental impact studies, noise control and hazardous wastes. The Ecological Law also regulates vibrations, thermal energy, soil pollution and visual pollution that result from construction, although the Mexican government has not yet issued specific enforcement standards on these issues. Pursuant to the Law of National Waters, companies that discharge waste water must

comply with maximum allowable contaminant levels in order to preserve water quality. The Ecological Law also provides that companies that contaminate the soil are responsible for clean-up. Promulgated pursuant to the Ecological Law, Mexican Official Norms, which are technical regulations issued by a competent regulatory authority, establish standards relating to air emissions, discharges of pollution and waste water and the handling of hazardous waste. Mexican Official Norms also regulate noise pollution. The Federal Attorney’s Office for the Protection of the Environment can bring administrative, civil and criminal proceedings against companies that violate environmental laws, and it also has the power to close non-complying facilities. Every company in Mexico is required to provide the National Institute of Ecology, the regulatory arm of the Ministry of the Environment, Natural Resources and Fishing, with periodic reports regarding compliance with the Ecological Law and the regulations thereunder.

     The level of environmental regulation in Mexico has increased in recent years, and the enforcement of the law is becoming more stringent. We expect this trend to continue and to be stimulated by international agreements between Mexico and the United States. We do not expect that compliance with Mexican environmental laws or Mexican state environmental laws will have a material effect on our financial condition or results of operations. There can be no assurance, however, that environmental regulations or the enforcement thereof will not change in a manner that could have a material adverse effect on our business, results of operations, prospects or financial condition.

     The Procuraduria Federal de Proteccion Ambiental (PROFEPA) has issued “clean industry” certificates for all of our airports. These certificates certify compliance with applicable Mexican environmental law regulations. We are in compliance with the requirement to renew these certificates every two years.

ORGANIZATIONAL STRUCTURE

     The following table sets forth our consolidated subsidiaries as of December 31, 2006, including our direct and indirect ownership interest in each:

Subsidiary		Ownership Interest
Aeropuerto de Cancun, S.A. de C.V.			99.99	%
Aeropuerto de Cozumel, S.A. de C.V. (1)			99.99	%
Aeropuerto de Merida, S.A. de C.V.			99.99	%
Aeropuerto de Huatulco, S.A. de C.V. (2)			99.99	%
Aeropuerto de Oaxaca, S.A. de C.V.			99.99	%
Aeropuerto de Veracruz, S.A. de C.V. (3)			99.99	%
Aeropuerto de Villahermosa, S.A. de C.V.			99.99	%
Aeropuerto de Tapachula, S.A. de C.V. (4)			99.99	%
Aeropuerto de Minatitlan, S.A. de C.V. (5)			99.99	%
Servicios Aeroportuarios del Sureste, S.A. de C.V.			99.99	%

All of our subsidiaries are organized under the laws of Mexico.

PROPERTY, PLANT AND EQUIPMENT

     Pursuant to the Mexican General Law of National Assets, all real estate and fixtures in our airports are owned by the Mexican nation. Each of our concessions is scheduled to terminate in 2048, although each concession may be extended one or more times for up to an aggregate of an additional fifty years. The option to extend a concession is subject to our acceptance of any changes to such concession that may be imposed by the Ministry of Communications and Transportation and our compliance with the terms of our current concessions. Upon expiration of our concessions, these assets automatically revert to the Mexican nation, including improvements we may have made during the terms of the concessions, free and clear of any liens and/or encumbrances, and we will be required to indemnify the Mexican government for damages to these assets, except for those caused by normal wear and tear.

     Our corporate headquarters are located in Mexico City, and total 742.64 square meters. We also rent two warehouses totaling 128 square meters located in Mexico City for storage. We maintain comprehensive insurance coverage that covers the principal assets of our airports and

other property, subject to customary limits, against damage due to natural disasters, accidents or similar events. We do not maintain business interruption insurance.

     Item 4A. Unresolved Staff Comments

     None.

     Item 5. Operating and Financial Review and Prospects

     The following discussion should be read in conjunction with, and is entirely qualified by reference to, our financial statements and the notes to those financial statements. It does not include all of the information included in our financial statements. You should read our financial statements to gain a better understanding of our business and our historical results of operations.

     Our financial statements were prepared in accordance with Mexican NIF, which differs in certain significant respects from U.S. GAAP. Note 16 to our financial statements provides a description of the principal differences between Mexican NIF and U.S. GAAP as they relate to us. See “—Differences between Mexican NIF and U.S. GAAP.”

Overview

     General

     We operate nine airports in the southeastern region of Mexico pursuant to concessions granted by the Mexican government. The substantial majority of our revenues are derived from providing aeronautical services, which are generally related to the use of our airport facilities by airlines and passengers. For example, in 2004, 2005 and 2006, approximately 75.4%, 70.8% and 70.9% respectively, of our total revenues derived from aeronautical services. Changes in our revenues from aeronautical services are principally driven by passenger and cargo volume at our airports. Our revenues from aeronautical services are also affected by the maximum rates we are allowed to charge under the price regulation system established by the Ministry of Communications and Transportation. The maximum rate system of price regulation that applies to our aeronautical revenues is linked to the traffic volume (measured in workload units) at each airport; thus, increases in passenger and cargo volume generally permit greater revenues from aeronautical services.

     We also derive revenue from non-aeronautical activities, principally related to the commercial services offered at our airports, such as the leasing of space to restaurants and retailers. Revenues from non-aeronautical activities are not subject to the system of price regulation established by the Ministry of Communications and Transportation. Thus, our non-aeronautical revenues are primarily affected by the passenger volume at our airports and the mix of commercial services offered at our airports. While aeronautical revenues should continue to represent a substantial majority of our future total revenues, we anticipate that the future growth of our revenues from commercial activities will eventually exceed the growth rate of our aeronautical revenues.

Recent Developments

     Recovery from Hurricane Wilma

     Our results of operations in 2006 continued to be affected by the extensive damage caused by Hurricane Wilma to hotel infrastructure in the Cancun, Cozumel and Mayan Riviera regions in October 2005, which adversely affected our passenger traffic. In addition, the Terminal 1 (the charter terminal) at Cancun Airport sustained substantial damage from the hurricane. We were instructed by the Mexican government to repair Terminal 1, and to put it back into service.

     As of year-end 2006, however, our results of operations had recovered significantly from Hurricane Wilma’s impact. Our passenger traffic increased 57.01% during the fourth quarter of 2006 as compared to the fourth quarter of 2005, and consequently, our revenues and operating income for the fourth quarter of 2006 increased 66.37% and 713.84%, respectively, relative to the same period in 2005.

     On May 18, 2007, we began operations in the new Terminal 3 at Cancun Airport. With a total investment of approximately U.S.$100 million, Terminal 3 constitutes our most ambitious investment project to-date. Terminal 3 will double international passenger capacity at Cancun Airport. The new building, measuring a total area of 42,000 square meters (approximately 452,084 square feet), will feature 84 check-in counters and 11 boarding gates with boarding bridges, as well as four gates served by buses. The terminal will feature state-of-the-art passenger information systems and security equipment, including the first CT scanning system in Mexico for all checked baggage. The cost of services may increase as a result of these investments.

     Mayan Riviera Airport Bidding Process

     We have learned through various sources that the Mexican government, acting through the Ministry of Communications and Transportation, is expected to use a public bidding process for the award of the concession for the construction, operation and management of an international airport in the Mayan Rivera in the state of Quintana Roo. We are not yet aware of any details regarding the expected public bidding process, including the timing or other terms. We are interested in participating in this bidding process, although there can be no assurance as to the outcome. See “Risk Factors—Risks Relating to Our Operations.”

Passenger Traffic Volume and Composition

     Our principal source of revenues is passenger charges collected from airlines for each passenger departing from the airport terminals we operate (excluding diplomats, infants and transfer and transit passengers). In 2004, 2005 and 2006, passenger charges represented 79.9%, 80.0% and 76.9% of our aeronautical services revenues and 60.3%, 56.7% and 54.6%, respectively, of our consolidated revenues. It follows that the main factor affecting our results of operations is the number of passengers using our airports.

     In recent years, the aggregate passenger traffic volume in our airports has been divided between domestic and international passengers at fairly constant levels. In 2004, 2005 and 2006, for example, approximately 61.6%, 60.7% and 58.20%, respectively, of the passengers using our

airports were international and the remaining were domestic. During 2004, 2005 and 2006, 42.1%, 38.1% and 35.1% of our total revenues were derived from passenger charges collected from international passengers.

     Of our passengers traveling internationally, a majority has historically traveled on flights to or from the United States. In 2004, 2005 and 2006, for example, approximately 42.7%, 41.9% and 38.5% of the total passengers and approximately 69.4%, 69.0% and 66.1%, respectively, of the international passengers in our airports arrived or departed on flights originating in or departing to the United States. As a consequence, our results of operations are substantially influenced by U.S. economic and other conditions, particularly trends and events affecting leisure travel and consumer spending. In addition, of our passengers traveling domestically, a majority has typically traveled on flights to or from Mexico City. In 2004, 2005 and 2006, for example, approximately 83.5%, 84.3% and 80.6%, respectively, of the domestic passengers in our airports arrives or departed on flights originating in or departing to Mexico City. Many factors affecting our passenger traffic volume and the mix of passenger traffic in our airports are beyond our control.

Classification of Revenues and Price Regulation

     For financial reporting purposes, we classify our revenues into two categories: revenues from aeronautical services and revenues from non-aeronautical services. Our revenues from aeronautical services hinge on passenger charges, landing charges, aircraft parking charges, charges for airport security services and for the use of passenger walkways. Our revenues from non-aeronautical services are associated with the leasing of space in our airports to airlines, retailers and other commercial tenants, access fees collected from third parties providing complementary services at our airports and related miscellaneous sources.

     Revenues from our airports are subject to a “dual-till” price regulation system. Under this system, a substantial portion of our revenues, such as revenues from passenger charges, landing charges, aircraft parking charges and access fees from third parties providing services at our airports, are regulated. Based on our classification of revenues for financial reporting purposes, all of our revenues from aeronautical services and certain of our revenues from non-aeronautical services are regulated by the Ministry of Communications and Transportation. The system of price regulation applicable to our airports establishes an annual maximum rate in pesos for each airport, which is the maximum annual amount of revenues per work load unit (equal to one passenger or 100 kilograms (220 pounds) of cargo) that we may earn at that airport from regulated services. The maximum rates for our airports have been determined for each year through December 31, 2008. In 2004, 2005 and 2006, approximately 78.8%, 74.6% and 74.7%, respectively, of our total revenues and approximately 15.5%, 13.7% and 12.9%, respectively, of our revenues from non-aeronautical services were earned from regulated sources of revenues. Revenues associated with leased space in our terminals (other than space leased to airlines and other space deemed essential to our airports by the Ministry of Communications and Transportation) are currently not regulated under the price regulation system.

     The following table sets forth our revenues for the years ended December 31, 2004, 2005 and 2006, based on the categories of services established under the Mexican Airport Law.

		Year ended December 31,
		2004								2005								2006
		(thousands of pesos, except percentages)
		Amount				Percent				Amount				Percent				Amount				Percent
Regulated Revenues:
Airport Services(1)			1,673,657				78.8	%			1,601,756				74.6	%			1,671,636				74.7	%
Non-regulated Revenues:
Access fees from non-permanent ground transportation			8,436				0.4	%			7,748				0.4	%			8,695				0.4	%
Car parking and related access fees			27,670				1.3	%			34,040				1.6	%			37,710				1.7	%
Other fees			3,375				0.1	%			3,179				0.1	%			2,362				0.1	%
Complementary Services(1)			0				0.0	%			0				0.0	%			0				0.0	%
Commercial Services			397,186				18.7	%			478,745				22.3	%			494,550				22.1	%
Other Services			14,267				0.7	%			21,992				1.0	%			24,008				1.0	%
Total			2,124,591				100.0	%			2,147,460				100.0	%			2,238,961				100.0	%