Document:

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                                                                    EXHIBIT 4.11

CONCESSION GRANTED BY THE FEDERAL GOVERNMENT THROUGH THE SECRETARY OF
COMMUNICATIONS AND TRANSPORTATION, REPRESENTED BY THE SECRETARY, THE LICENCIADO
CARLOS RUIZ SACRISTAN, IN FAVOR OF AEROPUERTO DE MONTERREY, S.A. DE C.V., A
MEXICAN CORPORATION, REPRESENTED BY ITS GENERAL DIRECTOR, MR. ROBERTO PEREZ
AREIZAGA, WHO SHALL BE REFERRED TO HEREAFTER AS THE SECRETARY AND THE
CONCESSIONAIRE, RESPECTIVELY.

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[SEAL OF SECRETARY OF COMMUNICATIONS AND TRANSPORTATION]

                                     CONTENT

1.    PLANS

2.    LIST OF CONTRACTS

3.    MANUALS AND GUIDELINES

      3.1   BASIC COURSE FOR FIREFIGHTERS OF THE AIRPORT

      3.2   MANUAL OF AIRCRAFT CHARACTERISTICS

      3.3   MAINTENANCE MANUAL

      3.4   MAINTENANCE MANUAL
            (SUPERVISION OF VISUAL AIDS AND SUBSTATIONS)

      3.5   MANUAL OF OPERATION OF FUEL PLANTS

      3.6   MANUAL OF QUALITY CONTROL PROCEDURES FOR THE SERVICE OF FUEL TO
            GENERAL AVIATION

      3.7   PROCEDURE MANUAL FOR THE SERVICE OF STORAGE AND PROVISIONING OF JET
            FUEL

      3.8   MANUAL FOR THE REMOVAL OF DISABLED AIRCRAFT

      3.9   CONTINGENCY PLAN

      3.10  AIRPORT EMERGENCY PLAN

      3.11  AIRPORT SECURITY PLAN

      3.12  INTERNAL CIVIL PROTECTION PROGRAM

      3.13  LEGAL FOUNDATIONS FOR PASSENGER AND BAGGAGE REVIEW

<PAGE>

[SEAL OF SECRETARY OF COMMUNICATIONS AND TRANSPORTATION]

CONCESSION GRANTED BY THE FEDERAL GOVERNMENT THROUGH THE SECRETARY OF
COMMUNICATIONS AND TRANSPORTATION, REPRESENTED BY THE SECRETARY, THE LICENCIADO
CARLOS RUIZ SACRISTAN, IN FAVOR OF AEROPUERTO DE MONTERREY, S.A. DE C.V., A
MEXICAN CORPORATION, REPRESENTED BY ITS GENERAL DIRECTOR, MR. ROBERTO PEREZ
AREIZAGA, WHO SHALL BE REFERRED TO HEREAFTER AS THE SECRETARY AND THE
CONCESSIONAIRE, RESPECTIVELY.

                                   BACKGROUND

The National Development Plan 1995-2000 establishes, for the goal of promoting
economic development, to have adequate, modern and efficient infrastructure.
Therefore, the conservation, modernization and amplification of the airport
infrastructure, the elevation of security levels, as well as the improvement of
the quality, access and efficiency of the services have been defined as
priority.

To comply with these objectives, the Inter-Secretarial Commission for Divestment
approved the program to carry out the process of opening the Mexican airport
system for investment, through various agreements dated August 20 and 25, 1997
and October 1st of that same year. The program consists of the creation of four
economic groups among which 35 airports have been distributed as follows: Grupo
Ciudad de Mexico (Mexico City), one airport, Grupo Centro Norte (North Central),
thirteen airports, Grupo Pacifico (Pacific), twelve airports, Grupo Sureste
(Southeast), nine airports.

The Ministry of Finance and Public Credit, upon a prior favorable opinion from
the Inter-Secretarial Commission for Expenditures and Funding in its February 4,
1998 session, authorized the creation Aeropuerto de Monterrey, S.A. de C.V. a
company with majority governmental participation, the purpose of which consists
principally in the administration, operation, construction and exploitation of
one airport, and the provision of the airport services, complementary and
commercial services, and whose representative capital stock (except one share)
are the property of a majority governmental owned entity named Grupo
Aeroportuario del Central Norte, S.A. de C.V (North Central Airport Group).

Airports and Auxiliary Services, a decentralized public body, has administered
and operated the airports of the Mexican Airport System since their creation,
one of which includes the Monterrey International Airport.

The Federal Government maintains the ownership of the public real property
necessary for the operation of the Monterrey, Nuevo Leon airport to which this
Concession refers, and the Secretary of Communications and Transportation has
the power to grant this Concession regarding such goods, under the terms of
Article 20 and Third Transitory of the Airport Law.

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On April 14, 1998, the Inter-secretarial Commission for the Granting of
Concessions and Permits Pursuant to the Airport Law referred to in Article 21 of
the Airport Law, met and issued a favorable opinion for the purpose of the
Secretary granting this Concession to the Concessionaire, subject to the
condition that such Commission reviews the term of any disposal of
representative capital stock of such entity that is the owner of at least 51% of
the representative capital stock of the Concessionaire by the Federal
Government, as part of the process of opening the Mexican airport system to
investment

Through official document number 110-2718 dated June 9, 1998, the Secretary of
Control and Administrative Development confirmed to the Secretary of
Communications and Transportation that it would not require the issuing of the
Agreement of destination regarding the Airport by it so that the Secretary of
Communications and Transportation could grant this Concession.

The Concessionaire is created in conformance with Mexican laws as corporation
(sociedad anonima de capital variable), as evidenced by public deed Number
44,363 dated May 28, 1998, granted under oath by Licenciado Emiliano Zubiria
Maqueo, Notary Public No. 25 of the Federal District, whose first document was
registered on June 25 1998, in commercial file Number 238,592, of the Public
Commercial Registry of Mexico City, Federal District. The Concessionaire sets
forth as its registered address to receive service of process as Miguel Aleman
Highway, Municipality of Apodaca, Nuevo Leon, Postal Code 66600, Mexico.

Mr. Roberto Perez Areizaga, legal representative of the Concessionaire, holds
sufficient legal capacity as evidenced by public deed Number 44,363 dated May 28
1998 granted under oath by Licenciado Emiliano Zubiria Maqueo, Notary Public No.
25 of the Federal District, whose first document was registered on June 25, 1998
in commercial file No. 238,592 of the Public Commercial Registry of Mexico City,
Federal District for the subscription of this agreement and his powers have not
been modified or revoked in any way.

Therefore, and based on Articles 36, section I, V, XII, XXIII, XXIV, and XXVII
of the Federal Organic Law of Federal Public Administration; 20 - 26 and 41 of
the General Law of National Property; 6 section I, III, and VII, 10, 14, 15, 20,
21, 25 and the others related to the Airports Law, and the 5 article sections XI
and XVIII of the Internal Regulations of the Secretary of Communications and
Transportation, this Secretary, with the prior opinion of the Inter-secretarial
Commission for the Granting of Concessions and Permits pursuant to the Airports
Law referred to in Article 21 of the Airports Law, grants this Concession
pursuant to the following:

                                   CONDITIONS

   1.    DEFINITIONS. For purposes of this Concession, it shall be understood
         for:

   Airport:   The civil aerodrome (air facility), as defined by the Law, located
              in the City of Monterrey, Nuevo Leon, the layout of

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                              which is set forth in Annex 1 to this Concession
                              and whose address is located on Miguel Aleman
                              Highway, Municipality of Apodaca, Nuevo Leon,
                              Postal Code 66600, Mexico.

  Concessioned Property:      The publicly held real property that is
                              granted in concession and as described in Annex 1,
                              as well as their constructed facilities. This
                              Concession excludes the goods that will be used by
                              Airports and Auxiliary Services for the provision
                              of services for supply and suction of fuel
                              pursuant to Condition 5. hereafter, and those
                              indicated in Annex 1.

  Concession:                 The concession granted in favor of the
                              Concessionaire and as described in Condition 2.
                              hereafter.

  Concessionaire:             Aeropuerto de Monterrey, S.A. de C.V., a company
                              created in accordance with Mexican law, that at
                              the time of granting of this Concession is a
                              company with majority state ownership, owner of
                              the rights contained in this Concession.

  Airport Infrastructure:     The areas described in Annex 1, including the
                              pentagon of the Airport including the Concessioned
                              Property and the Aerial Protection Zone.

  Law:                        The Airports Law

  Secretary:                  The Secretary of Communications and Transportation

  Services:                   Has the meaning set forth in Condition 4. of this
                              Concession.

  Aerial Protection Zone:     The area identified as such in Annex 1 of this
                              Concession.

2.    PURPOSE OF THE CONCESSION: The purpose of this document is to grant the
      Concessionaire:

2.1   A concession to administer, operate and exploit the Airport and if
      applicable, carry out construction in it, in case of it being included in
      the Master Development Program referred to in Condition 12 hereafter, in
      order to provide the Services in the Airport; and

2.2   A concession to use, exploit, and take advantage of the Concessioned
      Property.

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3.    REAL PROPERTY REGIME. Due to the Concession being granted to use, take
      advantage of, and exploit the Concessioned Property, the Concessionaire
      may do the following acts with respect to the Concessioned Property:

      3.1   Continue with contracts entered into with third parts regarding the
            Airport Infrastructure, in order to provide by itself or through
            third parties, the Airport and Complementary Services to the users
            requiring them; and

      3.2   Continue with the legal relationships already existing with third
            parties in substitution of Airports and Auxiliary Services regarding
            the use by such third parties of certain areas of the Airport
            Infrastructure, subject to that established by Article 60 of the
            Law, so that such third parties provide the Commercial Services in
            the Airport where the Concessionaire does not directly do so.

            The Concessionaire must permit the access and use of the areas
            located within the Concessioned Property, as identified in Annex 1,
            to the authorities or governmental agencies that are mentioned in
            that Annex, so that they may carry out their own activities within
            the Airport.

  4.  SERVICES. The Concessionaire shall at all times be responsible to the
      Secretary so that the Airport, Complementary, and Commercial services as
      defined in Article 48 of the Law, are provided under the terms of
      applicable law and specifically as set forth in this Concession, the Law
      and its Regulations.

      Neither the party acquiring the representative capital stock of Grupo
      Aeroportuario del Centro Norte, S.A. de C.V., majority shareholder of the
      Concessionaire, object of the bidding to be called by the Secretary, nor
      the shareholders or settlers-beneficiaries of the same, or the Related
      Persons of them or of the Acquiring Party, shall provide Airport Services
      in the Airport.

      For purposes of this Concession, "Related Persons" means regarding a
      Person (i) those entities that are Controlled, that are under common
      Control or that Control the entity that it involves, (ii) any subsidiary
      of a Related Person, (iii) those natural persons that are relatives by
      blood or law in a direct line through the fourth degree, descending or
      descending, with any Person that has 5% (five percent) or more of the
      representative capital stock of the person involved or with the Related
      Persons with such Person. "Person" means any natural or legal person,
      association, joint venture, co-investment, trust, or any other entity or
      organization, including a government, entity or political subdivision or
      agency of the same of any nationality. "Control" means (i) the
      shareholding by a Person of more than 35% (thirty-five percent) of the
      voting capital stock another person, (ii) the contractual right by a
      Person to designate the majority of the members of the Board of Directors
      of another Person, or (iii) the right of a Person to cause the approval or
      veto of any decision of the general shareholders meeting of another Person
      by its vote or with its vote together with another or other Related
      Persons.

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  5.  SERVICES FOR SUPPLY AND SUCTION OF FUEL: Unless the Secretary decides to
      the contrary and consequently empowers the Concessionaire to do so,
      Airports and Auxiliary Services shall provide the complementary services
      at the Airport consisting of supply and suction of fuel to those
      concessionaires and permitted parties of the aerial transportation
      services that are the users of the Airport. In order to comply with the
      foregoing, Airports and Auxiliary Services shall with the Concessionaire
      enter into the necessary agreements including the corresponding
      consideration to the Concessionaire, which shall be 1% of the amount over
      the service of storage and suction of fuel in the Airport. Airports and
      Auxiliary Services shall provide such service as long as the Secretary
      does not determine otherwise. Any conflict arising from the provision of
      the complementary service of storage and suction of fuel shall be resolved
      by the Secretary. Consequently, neither the Concessionaire nor any third
      party may provide the service of storage and suction of fuel.

  6.  JOINT OBLIGATION. The third parties that provide the Airport and
      Complementary Services under the terms of this paragraph shall be jointly
      responsible with the Concessionaire to the Federal Government as to the
      service provided. Therefore, in any contract to that effect entered into
      with such third parties, must include as an integral part, this Concession
      and its modifications, without annexes.

  7.  APPLICABLE LAW. The administration, operation, exploitation and if
      applicable, construction done in the Airport, as well as the provision of
      the Services that are the subject of this Concession shall be subject
      including but not limited, to that set forth in the Constitution of
      Mexico, to those international treaties already or to be entered into by
      the President of the Republic, with the approval of the Senate, and those
      inter-institutional agreements, to the Civil Code of the Federal District
      in local matters and the Civil Code for all of the Republic as to federal
      matters, the Federal Code of Civil Procedure and the Commercial Code, the
      Airports Laws, the laws of General Communication Routes, the Civil
      Aviation Law, the General Law of National Property, the Federal Law of
      Administrative Procedure, the Federal Measurement and Standards Law, the
      Federal Economic Competition Law, the General Ecological Equilibrium and
      the Environmental Protection Law and their implementing regulations, the
      state ecological laws, and those remaining technical and administrative
      provisions applicable in the topic that the Secretary states, to that
      provided in this Concession and the annexes that form a part of it, as
      well as the Official Mexican Standards that by their nature are applicable
      to this Concession, and to the dispositions regarding mitigation of
      environmental impact that are set by the competent authorities, and the
      legal rules that, due to their nature and purpose are applicable hereto.
      The Concessionaire is bound to follow and comply with them.

      The Concessionaire accepts that if those legal precepts and the
      administrative provisions referred to in the prior paragraph are
      abandoned, modified or added

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      to, it shall remain subject, at all times, to the new legislation and
      legal and administrative rules that are issued on the topic from their
      effective date.

  8.  LIMITS ON THE CONCESSION RIGHTS. The rights derived under this Concession
      are granted to the Concessionaire with the understanding that during the
      term of the Concession, the Concessionaire may contract with third parties
      for the provision of the Services under the terms set forth in Articles
      48, 52, and 54 - 57 of the Law. The Concessionaire may not use, take
      advantage of, or exploit the Airport or the Concessioned Property for any
      purpose other than those referred to in Conditions 2. and 4. above, unless
      it has the express authorization from the Secretary.

  9.  COMMENCEMENT OF OPERATIONS. The Concessionaire shall commence operations
      at the Airport no later than November 1, 1998, after having given notice
      of such commencement to the Secretary at least three (3) days following
      thereafter.

  10. EXISTING CONTRACTS. Airports and Auxiliary Services shall assign the
      Concessionaire, all rights and obligations derived from the services
      contracts and rental agreements for areas located within the Airport, as
      identified in Annex 2 of this Concession. Therefore such contracts shall
      continue to be valid until termination under their own terms and
      conditions.

      In accordance with that set forth in the immediately proceeding paragraph,
      the Concessionaire shall continue to perform the obligations of the
      Airports and Auxiliary Services established in the above referenced
      services contracts and rental agreements. Therefore, it shall notify the
      tenants of the above referenced assignment as well as regarding the terms
      and conditions of this Concession and particularly its obligations set
      forth in Article 52 of the Law.

      The Concessionaire is required to keep and hold Airports and Auxiliary
      Services in peace and harmless from any claims that the above referenced
      service providers or tenants have for breach of such terms and conditions
      as of the date on which the assignment becomes effective.

      The Concessionaire shall provide notice to the Secretary of those cases
      that it considers do not satisfy the requirements set forth in the Law so
      that such third parties continue to provide services in the Airport.

  11. REAL PROPERTY RIGHTS. This Concession does not create real property rights
      over the Concessioned Property for the benefit of the Concessionaire, as
      set forth in Articles 16 and 20 of the General Law of National Property.

  12. MASTER PLAN. No later than May 31, 2000, the Concessionaire shall present
      to the Secretary for its approval, a Master Airport Development Program,
      reviewable every five (5) years, which it must create based on the
      policies and

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      programs established for the development of the national airport system
      and its interrelationship with other transportation means.

      After approval by the Secretary, the Master Airport Development Program
      shall become a part of this Concession.

  13. ADMINISTRATION AND OPERATION OF THE AIRPORT. For the administration,
      operation and exploitation of the Airport, and if applicable, construction
      of works within it, the Concessionaire shall be subject to the rules
      established in Chapters V, VI, and VII of the Law and the remaining
      applicable dispositions in force.

  14. SECURITY. For the security and security conditions at the Airport, the
      Concessionaire shall be subject to the rules established in Chapter IX of
      the Law.

  15. GUIDELINES. Unless the Secretary establishes guidelines to which the
      Concessionaire must subject itself under the terms of the Law for the
      operation, administration, maintenance, security and internal surveillance
      of the Airport, the Concessionaire shall be subject to those manuals and
      guidelines issued by Airports and Auxiliary Services for such purposes,
      which are attached to this Concession as Annex 3.

  16. FEES. The Concessionaire shall charge the fees for the provision of the
      Airport Services that the Secretary of Tax and Public Credit authorizes
      with the participation corresponding to the Secretary.

      In case the Concessionaire ceases to be a majority state owned enterprise,
      the imposition and charging of fees for the provision of the Airport
      Services shall be subject to the Bases of Tariff Regulation issued by the
      Secretary under the terms of Articles 67 and 70 of the Law, which shall
      form a part of this Concession Title. Such fees shall be applied in a
      non-discriminatory manner and shall be the same for all users that are
      similarly situated. The only fees that may be applied are those registered
      and published in the Official Gazette of the Federation.

      Additionally the Secretary may establish, in conformance with such bases,
      the fees, and specific prices for the provision of Airport Services and
      for rentals and exchanges related to the Contracts that the Concessionaire
      enters into with providers of Complimentary Services where there are not
      reasonable competitive conditions, in accordance with the opinion of the
      Federal Competition Commission.

  17. INSURANCE. The Concessionaire shall be liable for the damages imputable to
      it. Therefore under the terms of Article 76 of the Law, it must have
      insurance covering its corresponding indemnities. The insurance policy and
      its renewals shall be registered before the Secretary and shall be in
      force during term of this Concession.

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      Notwithstanding the foregoing, until the Concessionaire receives an
      assignment by Airport and Auxiliary Services of the insurance policy
      referred to in the above paragraph, Airports and Auxiliary Services shall
      be responsible to maintain the property, assets and services provided in
      the Airport under insurance in the same form and terms set forth at the
      date of the granting of this Concession.

  18. CONSIDERATION TO THE FEDERAL GOVERNMENT. The Concessionaire shall pay the
      Federal Government the one-time payment set by the Secretary under the
      terms that the Secretary notifies to the Concessionaire.

  19. DUTIES. From the effective date of this Concession, the Concessionaire
      shall pay the Federal Government those duties for the provision of the
      Services and for the use, exploitation and taking advantage of the
      Concessioned Property, as set forth in the Federal Duties Law, under the
      terms and the time-frames set forth therein.

  20. GUARANTEE. In the event the Concessionaire ceases to be a corporation with
      majority governmental participation, the Secretary may require that the
      Concessionaire grant a guarantee that guarantees the responsibilities
      assumed in this Concession, in an amount and in the form determined by the
      Secretary for such purpose.

  21. FOREIGN APPLICATION. The Concessionaire shall have no further rights than
      those provided by Mexican law. Therefore, the Concessionaire in whose
      capital foreign investors participate, by this document expressly
      undertakes to not invoke the protection of any foreign government, under
      penalty of losing their rights under this Concession to the benefit of the
      Mexican nation, if it does so to the contrary.

  22. TERM. This Concession shall become effective on November 1, 1998 for a
      term of fifty (50) years, extendable under the terms of Article 15 of the
      Law.

  23. MODIFICATIONS OF CONDITIONS. The conditions established in this Concession
      may be reviewed and modified by agreement between the Secretary and the
      Concessionaire in conformance with the Law and the other applicable
      provisions, with the understanding that this Concession shall be modified
      by the Secretary without prior agreement of the Concessionaire once the
      Regulations of the Law are published, so that this Concession's terms are
      adjusted to the provisions of it, as well as to the process of the opening
      the Mexican airport system for investment.

  24. VERIFICATION. The Concessionaire shall permit access to its installations
      by the personnel of the Secretary indicated by it in order to verify the
      compliance by the Concessionaire with the provisions of the Law and the
      other applicable orders.

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  25. TERMINATION. This Concession shall terminate for any of the causes set
      forth in Article 26 of the Law. The termination of the Concession shall
      not cease the obligations undertaken by the Concessionaire during its
      effectiveness. In addition to the events of revocation contemplated by the
      Law, the breach of any of the obligations established in Conditions 18,
      19, and 20 shall be events of revocation of this Concession.

      In the event of termination of the Concession for any of the events of
      revocation set forth in Article 27 of the Law, the Secretary shall make
      the guarantee set forth in the previous Condition 20 effective.

  26. REVERSION. At the termination of this Concession, or its extensions if
      any, the works and installations permanently affixed to the Concessioned
      Property shall revert to the Mexican nation, under the terms of Article 20
      of the General Law of National Goods.

  27. REGISTRATION. The Concessionaire must register this Concession under the
      terms set forth in Article 75 of the Law.

  28. JURISDICTION. For all matters related to the interpretation and
      performance of this Concession, except those that are to be
      administratively resolved by the Secretary or by other authorities under
      the Airports Law, the Concessionaire agrees to submit itself to the
      jurisdiction of the Federal courts of Mexico City, Federal District, and
      waives any other forum which could correspond to it by reason of its
      present or future address.

  29. PUBLICATION. The Concessionaire must, at its own cost, process the
      publication of an excerpt of this Concession Title that the Secretary
      authorizes it to publish in the Official Gazette of the Federation, no
      later than November 30, 1999.

  30. ACCEPTANCE. The annexes to this Concession form an integral part of the
      same. The execution of this document by the Concessionaire implies the
      unconditional acceptance of the terms and conditions of the Concession by
      the Concessionaire commencing on the date of its granting.

This Concession is granted in Mexico City, Federal District, on June 29, 1998.

                 SECRETARY OF COMMUNICATIONS AND TRANSPORTATION
                              [SIGNATURE ILLEGIBLE]
                              CARLOS RUIZ SACRISTAN

<PAGE>

                                                   WE UNCONDITIONALLY ACCEPT THE
                       TERMS CONTAINED IN THIS CONCESSION TITLE AND ITS ANNEXES.
                                           AEROPUERTO DE MONTERREY, S.A. DE C.V.

                                                           [SIGNATURE ILLEGIBLE]
                                                       BY ROBERTO PEREZ AREIZAGA
                                                    TITLE:  LEGAL REPRESENTATIVE<PAGE>

                                                                    Exhibit 4.12

                    AMENDED AND RESTATED CONSORTIUM AGREEMENT

          THIS AMENDED AND RESTATED CONSORTIUM AGREEMENT DATED AS OF JULY 6,
2004 IS ENTERED INTO BETWEEN (1) AEROPORTS DE PARIS, A FRENCH STATE OWNED ENTITY
WITH LEGAL CAPACITY AND ITS OWN ASSETS ("ADP"), (2) AEROINVEST, S.A. DE C.V.
("AEROINVEST") A CORPORATION ORGANIZED UNDER THE LAWS OF THE UNITED MEXICAN
STATES ("MEXICO"), AND (3) VASA S.A., A CORPORATION ORGANIZED UNDER THE LAWS OF
FRANCE. ("VASA");, ADP, AEROINVEST AND VASA ARE HEREINAFTER REFERRED TO
INDIVIDUALLY AS A "PARTY" AND COLLECTIVELY AS THE "PARTIES" TO THIS AGREEMENT
TOGETHER WITH CONSTRUCTORAS ICA, S.A. DE C.V. ("CICASA") AND CONTROLADORA DE
OPERACIONES DE INFRAESTRUCTURA, S.A. DE C.V. ("COINSA"), AS JOINT AND SEVERAL
OBLIGORS OF AEROINVEST AND VINCI S.A.("VINCI"), AS OBLIGOR OF VASA.

                                   WITNESSETH:

          WHEREAS, on December 17, 1999 the Secretaria de Comunicaciones y
Transportes (the Mexican Ministry of Communications and Transport, hereinafter
"SCT") published an invitation to tender (hereinafter the "Tender"), which, for
the purposes of this Agreement, includes the Participation Agreement, the Stock
Purchase Agreement, the Operation Agreement, the Option Agreement, the Trust
Agreement, the Shareholders Agreement, the Technical Assistance and Technology
Transfer Agreement, the Concession Titles, the Administrative Services Rendering
Agreement, the Holding Company, the Service Company and the Subsidiaries'
By-Laws (each as defined), and any other Tender documents and specifications
delivered by SCT to the Parties (hereinafter collectively referred to as the
"Transaction Documents") for the acquisition of a portion of the capital stock
of Grupo Aeroportuario del Centro Norte, S.A. de C. V. ("GCN"), the holding
company of the Mexican Center North group of airports (all of the above
hereinafter referred as the "Project").

          WHEREAS, ADP as an international airport operator, developer and
owner, and CICASA as a long term participant in the development, construction
and operation of Mexican infrastructure with knowledge of the Mexican market
conditions and experienced in infrastructure privatization projects, were
authorized by SCT, on March 27, 2000, to participate in the Tender as the
operating partner (the "Operating Partner") and the Mexican Partner (the
"Mexican Partner") respectively, and are together hereinafter referred to as the
"Key Partners", of a group of participants;

          WHEREAS, Societe Generale d'Entreprises ("SGE") as a leading
construction and transport concession company, was authorized by SCT to
participate in the Tender as an investment partner (the "Investment Partner")
and collectively with the Key Partners (the "Partners to the Strategic
Partner");

          WHEREAS, on June 14, 2000, the Parties executed the Transaction
Documents with the Mexican Government pursuant to which the Mexican Government
through a Mexican trust ("Nafin Trust") is holding and controlling 85% of GCN's
capital stock and the refining portion of GCN's capital stock is controlled by
Servicios de Tecnologia Aeroportuaria, S.A. de C.V. ("SETA" or the "Strategic
Partner", formerly known as Operadora Mexicana de Aeropuertos, S.A. de C.V.)
through a Mexican trust (the "Guaranty Trust").

<PAGE>

          WHEREAS, the Parties executed a consortium agreement dated May 16,
2000, which was subsequently amended on June 7, 2000, June 14, 2000, January 3,
2001, December 19, 2002, September 26, 2003 and April 22, 2004 ( the consortium
agreement with its amendments being collectively hereinafter referred to as the
"2000 Consortium Agreement")

          WHEREAS, in accordance with the Transaction Documents, the Strategic
Partner's capital stock shall be distributed as follows (i) the Mexican Partner
and Operating Partner shall together hold a minimum 51%, of the Strategic
Partner capital stock; (ii) the Mexican Partner shall hold a minimum 25.5% of
the Strategic Partner capital stock; and (iii) the Operating Partner shall hold
a minimum 10% of the Strategic Partner capital stock by the end of the fourth
year following the execution of the Operation Agreement. The Strategic Partner
has certain possibilities to purchase additional shares in GCN (i) through the
exercise of the option to purchase 3% of GCN's capital stock (the "Option
Shares"), or (ii) in the event GCN fails to offer in four years from the
execution of the Participation Agreement through an international public
offering a minimum of 36% of the capital stock of GCN, the Strategic Partner is
entitled, pursuant to section 3.4 of the Participation Agreement, to purchase
36% of GCN's capital stock (the "Additional Shares"). Any participation of the
Mexican Partner or the Operating Partner above the minimum required would be
considered as an Investor Partner participation with respect to the Transfer
Restrictions established for the participation held through the Trust Agreement
and acquired by the Partners in the Strategic Partner in the Transaction
Documents.

          WHEREAS, upon the transfer of the shares owned by Vinci (formerly SOB)
in SETA to VASA, VASA became a party to the 2000 Consortium Agreement on
December 21, 2001;

          WHEREAS, Vinci remained liable for the obligations of VASA under the
2000 Consortium Agreement;

          WHEREAS, upon the transfer of the shares owned by CICASA in SETA to
COINSA and subsequently to Aeroinvest, Aeroinvest became a party to the 2000
Consortium Agreement on September 26, 2003, with CICASA and COINSA remaining
jointly and severally liable for the obligations of Aeroinvest under the 2000
Consortium Agreement;

          WHEREAS, by a letter dated August 1, 2003, SCT authorized the transfer
of the shares of SETA to Aeroinvest based on the terms of the letter requesting
such authorization addressed by COINSA to SCT and under which COINSA informed
SCT that it will hold a 40 percent interest n Aeroinvest and will remain jointly
and severally liable under the Participation Agreement;

          WHEREAS, the Parties now wish to amend and restate the 2000 Consortium
Agreement and such 2000 Consortium Agreement shall be amended and superseded in
its entirety by this Agreement;

          NOW, THEREFORE, in consideration of the premises and the mutual
covenants and obligations hereinafter set forth, and other good and valuable
consideration, the receipt and sufficiency of which are hereby acknowledged, the
Parties hereto agree as follows:

                                       2

<PAGE>

                                   DEFINITIONS

          All capitalized terms used herein shall, unless otherwise defined
herein, have the same meanings ascribed to them in the Transaction Documents. In
addition, the following terms shall have the respective meanings assigned to
them:

          "Administrative Structure of GCN" shall mean the organizational
structure of the Officers of GCN, to be proposed by the Parties to SCT pursuant
to Clause 4.2. hereof and shown in Exhibit "A" attached hereto.

          "Airports" shall mean the airports subject to Concession Titles,
granted in favor of each of the airport operating Subsidiaries.

          "BB Shares" means the acciones de la serie "BB" as defined in Articulo
Segundo, clause tres of the Estatutos Sociales de Grupo Aeroportuario del Centro
Norte, S.A. de CV.

          "Business Day" shall mean any day except a Saturday, Sunday or any
other day on which commercial banks in the City of New York, New York, United
States, or Mexico City, D.F., Mexico, or Paris, France, are authorized by law to
close. All references to "days" in this Consortium Agreement shall mean Business
Days unless otherwise stated.

          "Confidential Information" shall mean all information (whether or not
specifically labeled or identified as "confidential"), in any form or ID diem
related to each of the Parties, that is known or will be known by the other
Parties in connection with the business of the Parties or otherwise.
Confidential Information shall include, without limitation, all of the
following: prototypes, files, analyses, techniques, systems, formulae, research,
records, documentation, models, data, data bases, ideas, inventions, designs,
developments, devices, methods, processes (whether or not patentable or reduced
to practice), specifications, commercial information such as customer lists,
pricing, costs etc., related to each of the Confidential Information shall not
include any information that each of the Parties can demonstrate to the other
Parties has or becomes publicly known through no wrongful act or breach of
another person's obligation of confidentiality.

          "Consortium" shall mean the consortium formed by the Parties in
connection with the Project.

          "Consortium Interest" means Debt Interest or Equity Interest or a
combination thereof.

          "Deadlock" shall mean the event of an unresolved matter or
impossibility to reach a decision at the Board of SETA with respect to a Major
Decision, under the provisions and percentage of affirmative vote required under
Clause 3.2.4 hereof.

          "Debt Interest" means the debt instruments issued pursuant to the Long
Term Commercial Loan Contracts, dated as of December 26, 2000 (the "Long Term
Loan Contracts"), and currently held by the Parties hereto and any additional
debt instruments, except the New Shareholder Debt Interest, issued pursuant to
the terms hereof to the Parties.

                                       3

<PAGE>

          "Equity Interest" means any equity interest issued and outstanding in
SETA from time to time, including any equity interest issued after the date
hereof.

          "Executive Committee" shall mean the committee of GCN referred to in
Clause 4.3 hereof, and shall consist of the General Director, the Chief
Financial & Administration Manager and the Chief Operations & Commercial
Development Manager.

          "Extended Transfer Restrictions" shall have the meaning set forth in
Clause 7.1.5.

          "Fair Market Value" means the fair market value of the Equity Interest
or Debt Interest based on what a willing buyer would pay a willing seller for
such interest as determined by an audit firm chosen pursuant to the following
procedure: The Prepayment Parties shall nominate three (3) internationally
recognized accounting and audit firms that have offices in Mexico. Each nominee
will be provided with a full description of the services to be provided. Within
seven (7) calendar days of receiving the nominations, the Non-Prepayment Party
will inform the Prepayment Parties of its preference; provided, however, if
there is more than one Non-Prepayment Party, then the Non-Prepayment Party
holding the greater percentage of Equity Interest shall have the right to choose
the nominee that will make the Fair Market Value determination. Whichever
nominee is so chosen will be immediately hired by the Prepayment Parties and the
Non-Prepayment Parties to determine the Fair Market Value of the Consortium
Interest. If the Prepayment Parties have not received an answer within seven (7)
days of delivery of the notice to the Non-Prepayment Parties, then the
Prepayment Parties shall have the right to appoint an accounting and audit firm
of their choice from the list of nominated accounting and audit firms. The cost
of the services of the appointed accounting and audit Firm will be paid by all
the Prepayment and Non-Prepayment Parties pro rata based on their Consortium
Interest in SETA on the day of such appointment of the accounting and audit
firm.

          "GCN" shall have the meaning set forth in the Recitals.

          "Holding Company" shall mean Grupo Aeroportuario del Centro Norte,
S.A. de C.V. also defined as the "Corporation" under the Transaction Documents.

          "IPO" shall mean the initial public offering of a portion of GCN's
capital stock contributed by the Mexican Government to the Nafin Trust, pursuant
to the provisions of the Participation Agreement, the Shareholders Agreement and
the Option Agreement.

          "Interest" or "Shares" shall mean as the case may be, a capital
interest participation in the outstanding and fully paid issued capital stock of
the Strategic Partner, as well as any loans which the shareholders of the
Strategic Partners may have granted or may grant to the latter, whether in
Mexican Pesos, legal tender of the United Mexican States, or any other legal
tender different therefrom.

          "Internal Costs" shall mean those costs and expenses properly incurred
by the Parties for the Project up to Initial Capitalization Date, in accordance
with this Agreement, which are not External Costs .

          "Major Decision" shall have the meaning set forth in Clause 3.2.4
hereof.

                                        4

<PAGE>

          "Major Project Contract" shall mean each of this Agreement, the
By-laws and Shareholders' Agreement of SETA, the Project Management Agreement,
the Operation Agreement, the Transaction Documents, any other agreement to which
SETA is a party, and any agreement to which the Holding Company or any of its
Subsidiaries is a party provided that it falls within the criteria outlined in
Clause 3.2.4 (k) and (l).

          "Management Fee" shall mean the fees that the Strategic Partner, will
receive in consideration of the services rendered pursuant to the terms and
conditions of the Technical Assistance and Technology Transfer Agreement and the
Administrative Services Rendering Agreement.

          "Master Development Program" shall have the meaning set forth in the
Shareholder Agreement.

          "Nominees" shall mean the persons appointed by Shareholders of SETA to
represent them during Shareholder Meetings of SETA pursuant to Clause 3.1.2
hereof.

          "Obligation" shall mean any obligation or liability, burden lien,
encumbrance, or responsibility contained or established in the Transaction
Documents applicable to the Strategic Partner, including but not limited to the
following:

<TABLE>
<CAPTION>
              AGREEMENTS                               OBLIGATION
              ----------                               ----------
<S>                                     <C>
a) Participation Agreement Section      Pay purchase price for 15% of GCN's
2.1; and Stock Purchase Agreement       capital stock; 25% upon the execution of
Section 2.4                             the Stock Purchase Agreement and 75% on
                                        September 14, 2000, plus accrued
                                        interest at the agreed interest rate.

b) Participation Agreement Section      Provide Technical Assistance.
2.6; and Technical Assistance and
Technology Transfer Agreement Section
2.2

c) Participation Agreement Section      Quality Guaranty of the standards of the
2.6; and Technical Assistance and       Technical Assistance and the people
Technology Transfer Agreement Section   involved,
3.2

Participation Agreement Section 2.6;    Indemnity for the use of Intellectual
and Technical Assistance and            Property
Technology Transfer Agreement Section
9.2 and 10.1

e) Participation Agreement Section      Indemnity for damages to third parties
2,6; and Technical Assistance and       and the Airports.
Technology Transfer Agreement Section
9.3 and 10.1
</TABLE>

          "Officers" shall mean the seven executive managers of GCN appointed in
accordance with Clause 4.2 hereof.

                                       5

<PAGE>

          "Operation Agreement" shall mean the operation agreement between SETA
and ADP executed on and that is attached hereto as Exhibit E.

          "Permitted Investments" shall mean marketable securities with an
investment grade rating in the respective currency in which the securities are
denominated (as determined by Standard & Poors Corp. or Moody's investors
Services Inc.) which the Holding Company or any of its subsidiaries shall
purchase for cash management purposes.

          "Project Management Agreement" shall mean the agreement between the
Parties as set out in Clause 8 hereof.

          "Related Party" shall mean (i) in all cases, any person controlling,
controlled by, or under common control with, a Party, and (ii) the spouse,
sibling, parent, child or other blood or in-law family members within the fourth
degree, in a direct or collateral line, of a Party. A Party will be deemed to
control another Party (other than a natural Person) if the first Party
possesses, directly or indirectly, the power to direct or cause the direction or
management and policies of the other Party, whether through the ownership of
voting securities, by contract or otherwise.

          "Representatives" shall mean the following representatives of the
Parties:

          a) ADP, Dominique Pannier or his replacement as ADP may solely decide
     from time to time,

          b) AEROINVEST: Luis Zarate Rocha, or his replacement as AEROINVEST may
     solely decide from time to time,

          c) VASA: Renaud de Matharel or his replacement as VASA may solely
     decide from time to time.

          "Secured Credit Agreement" means, collectively, the Senior Secured
Credit Agreement, dated as of June 28, 2002, among SETA, WestLB AG (formerly
known as Westdeutsche Landesbank Girozentrale) ("WestLB"), New York Branch, ADP,
VASA and COINSA, and the Amended and Restated Senior Secured Credit Agreement
dated as of December 19, 2002 among SETA, WestLB, ADP, VASA and COINSA, as
amended from time to time.

          "SETA" means Servicios de Tecnologia Aeroportuaria, S.A. de C.V.
(formerly known as Operadora Mexicana de Aeropuertos, S.A. de C.V.), a sociedad
anonima organized under the laws of the United Mexican States.

          "Subsidiaries" shall mean the companies owned or controlled by GCN.

          "Transaction Documents" shall have the meanings set forth in the
recitals of this Agreement.

                                       6

<PAGE>

          "Transfer Restrictions" shall mean any exit restriction or impediment
provided in the Transaction Documents that may oblige any of the Parties to
maintain a minimum capital participation in the Strategic Partner for a
determined period of time.

I.   PURPOSE

1.1  This Agreement establishes the agreement among the Parties, with respect
     to:

     (a)  the corporate and/or contractual governance rules of, and access to
          third parties by either SETA or GCN; and

     (b)  other commitments among the Parties with respect to their
          participation in the Project.

1.2  The intention of the Parties is to hold Interests in SETA, in each category
     of shares of SETA, and the Parties shall have the same rights and
     obligations as shareholders of SETA, but in proportion to their Interest.
     The Parties agree to seek on a best efforts basis to achieve and keep this
     structure.

II.  (OMITTED)

III. MANAGEMENT OF THE STRATEGIC PARTNER

3.0  MANAGEMENT

     The business and affairs of SETA shall be supervised and managed by or
     under the direction of the shareholders of SETA pursuant to Clause 3.1
     hereof and of a Board of Directors (the "Board of SETA") which shall make
     decisions as set forth in Clause 3.2 hereof

3.1  SHAREHOLDERS' MEETINGS

3.1.1 FREQUENCY AND NOTICES

     (a)  Shareholders of SETA shall hold a meeting (a "SETA Shareholders
          Meeting") at least once annually and prior to each and every
          shareholder meeting of GCN.

     (b)  The Board of SETA or the statutory examiners shall otherwise have the
          right to call at any time a SETA Shareholders Meeting (either at the
          request of a shareholder or one or more Directors) by sending a
          written notice to the shareholders, signed by the Secretary of the
          Board of SETA.

     (c)  Each shareholder shall receive such written notice at least 15
          Business Days prior to the date of the meeting, except in the
          circumstances described in Clause 3.1.3 and Clause 3.1.5 (d).

                                       7

<PAGE>

3.1.2 NOMINEES

     The SETA Shareholders Meeting shall include the Nominees who shall be
     executive managers of each of the shareholders of SETA. Each shareholder
     shall have the right to appoint one Nominee

     Directors of the Board of SETA shall not he appointed as Nominees.

3.1.3 QUORUM & VOTING RULES

     A quorum for the SETA Shareholders' Meeting shall exist where 76.5% of the
     issued Shares of SETA are present either physically or by proxy. However, a
     quorum of 100% of the issued Shares of SETA shall be required for
     shareholders meetings where decision regarding Clauses 11.5 (e), (f), (g),
     (j) and (m) are to be taken. In case of attendance of a Nominee due to
     unforeseeable reasons beyond his reasonable control) of a meeting shall be
     rescheduled for the following week (but at least 4 Business Days laterat
     the earliest, unless otherwise agreed by all the Nominees.

     The ordinary and extraordinary shareholders meetings installed in second or
     subsequent call will be legally covered when shareholders representing at
     least 62.75% of the capital stock are present and vote in the meeting, and
     the resolutions will be considered legally adopted when favorable vote of
     76.5% of the capital stock actually represented in the meeting is obtained,
     provided, however, that those shares represented at the meeting but
     abstaining to vote will not be counted as represented at the meeting for
     this purpose. A second or subsequent call will be issued in any particular
     meeting, in the understanding that there shall be at least ten natural days
     between the date of the meeting in which the quorum was not achieved and
     the date of the subsequent meeting.

     Each shareholder shall have the same number of votes as the number of
     Shares held by it in the capital stock of SETA.

3.1.4 ORDINARY MEETINGS

     The following decisions shall be made in the Ordinary SETA Shareholders
     Meeting which shall be convened both annually and before every shareholder
     meeting of GCN.

     The following decisions shall require the affirmative vote of at least a
     76.5 % Interest of the shareholders in the Strategic Partner:

     (a)  approval of the financial statements of SETA and review of the
          analysis prepared by the statutory examiners;

     (b)  nomination of the appointees of the shareholders of SETA to attend
          shareholders' meetings of GCN;

     (c)  approval of any proposal to be submitted or approved by the appointees
          of the shareholders of SETA during shareholders' meetings of GCN;

                                       8

<PAGE>

     (d)  approval of the financial statements of GCN before such statements are
          presented by the Operating Committee of GCN to the Board of GCN and to
          the shareholders' meeting of GCN for approval;

     (e)  approval of the dividend policy of GCN before it is proposed by the
          Operating-Committee of GCN to the shareholders' meeting of GCN for
          approval.; and

     (f)  appointment of the Directors of the Board of SETA and the statutory,
          examiners of SETA and determination of their compensation.

3.1.5 EXTRAORDINARY MEETINGS

     The following decisions shall be taken in an Extraordinary SETA
     Shareholders Meeting:

     (a)  approval of the sale of Shares by VASA resulting in its Interest
          becoming less than 25.5% during the Fifteen Year Waiting Period (as
          defined in the Clause 2.4.1 of the Participation Agreement);

     (b)  to the extent the Technical Assistance and Technology Transfer
          Agreement remains in full force and effect, including in circumstances
          where the term of such Agreement would have been automatically renewed
          pursuant to Section 5.2 of said Agreement, approval of the sale of
          Shares by any Party which would reduce the Interest of such Party in
          the Strategic Partner below 25.5%;

     (c)  pledge of any Shares held in the Strategic Partner;

     (d)  resolution of a Deadlock. In such circumstances, the prior written
          notice referred to in Clause 3.1.1 (c) shall be reduced to one week;

     (e)  amend or terminate this Agreement (including the Project Management
          Agreement), SETA's by-laws or SETA's shareholders agreement (including
          amending SETA's duration, dissolution or liquidation of SETA,
          decreasing SETA's capital stock, changing SETA's nationality or legal
          nature) provided that in the case of any agreement to which the
          Holding Company or any of its subsidiaries is a party, falling within
          the criteria outlined in clause 3.2.4 (k) and (l) the decision shall
          be limited to recommending the amendment or termination of such
          agreement;

     (f)  amend or terminate the Corporate By-laws of the Holding Company, or
          the Participation Agreement, or the Shareholders Agreement, or the
          Technical Assistance and Technology Transfer Agreement or the Option
          Agreement pursuant to Article 44 of the By-laws of the Holding
          Company, to Article 10.2.1 of the Participation Agreement, Articles
          11.2 and 9.1 of the Shareholders Agreement, Articles 5.1 and 15.2 of
          the Technical Assistance and Technology Transfer Agreement and
          Articles 7.2 and 8 of the Option Agreement;

     (g)  merge, split, dissolve or liquidate OCN pursuant to Article 44 of the
          By-laws of the Holding Company;

                                       9

<PAGE>

     (h)  register SETA on any stock exchange;

     (i)  increase SETA's share capital, or create new categories of shares or
          securities or convert the shares;

     (j)  as regard the rights of the shareholders of SETA to reduce the
          variable capital thereof, any such capital reduction as described in
          article nine (9) of the by-laws of SETA may be only exercised with the
          prior unanimous approval of the shareholders.

     (k)  sale of any shares or of the option to buy a further 3% of shares (or
          of any part thereof) held by the Strategic Partner in GCN; exercise of
          such option;

     (l)  conversion of BB shares to B shares (as defined in Article VI of the
          By-laws of the Holding Company);

     (m)  decisions in connection with Clauses 7.1.2 or 7.1.3 hereof;

     (n)  make any other decision, which they deem appropriate.

     Decisions regarding Clauses 3.1.5 (e), (f), (g) and (m) shall be made by
     unanimous consent. All other decisions regarding Clauses 3.1.4 and 3.1.5
     shall require a super majority approval of 76.5% of voting shares.

3.1.6 MINUTES

     Minutes of SETA Shareholders Meetings shall be recorded by the Secretary of
     the Board of SETA, as defined below. Minutes will be circulated to the
     shareholders for approval within 10 Business Days following the meeting.

3.2  BOARD OF THE STRATEGIC PARTNER

3.2.1 FREQUENCY AND NOTICES

     (a)  The Chairman of the Board shall call a meeting whenever a Director so
          requests in writing and, in any event, not less than every 6 weeks or
          as required by stock exchange registration rules as the case may be.
          In any event, a meeting shall be called immediately before a board
          meeting of GCN.

     (b)  Each Director shall receive a written notice of a meeting the
          Secretary of the Board at least fifteen days prior to the date
          scheduled for meeting of the Board , except in the event of a dispute
          among the Officers e Executive Committee which requires an urgent
          resolution, in which case Clause 4.3.3(e)(i) shall apply.

     (c)  If any such meeting is postponed or cancelled for any reason, the
          Secretary of the Board shall deliver a notice to each Director as soon
          as possible, but in any event at least three Business Days prior to
          the date scheduled for the postponed or cancelled meeting.

                                       10

<PAGE>

     (d)  If a new date is to be set for a meeting following such postponement
          or cancellation, each Director shall be notified in writing by the
          Secretary of the Board at least five Business Days prior to the new
          date.

3.2.2 MEMBERS

     The Board shall be comprised of a maximum of 7 (seven) members (each one a
     "Director" and collectively the "Directors"). Each shareholder in the
     Strategic Partner shall have the right to appoint one Director and its
     alternate for each 12.75 % Interest it owns in SETA.

     The chairmanship of the Board shall rotate among the Parties every two
     years, it being understood that the current Chairman is a Director
     designated by ADP, that the next Chairman to be elected in October 2004
     shall be a Director designated by Aeroinvest, and that the succeeding
     Chairman to be elected in October 2006 shall be a Director designated by
     VASA. This order shall be kept for the following years. The Chairman shall
     not have a tie-breaking vote,

     The Directors shall collectively designate a secretary of the Board (the
     "Secretary of the Board") who shall not be a member of the Board.

3.2.3 QUORUM & VOTING RULES

     A quorum for a first call meeting shall exist where 6 (six) of the
     Directors or their corresponding alternates are present, but in any event
     the presence of all the Directors or their alternates representing the
     Parties shall be required.

     The quorum for a second or subsequent Board meeting shall exist where 4
     (four) of the Directors or their corresponding alternates are present,
     subject to Clause 3.2.4 hereof.

     The Directors of each Party present at a Board meeting shall have 1 (one)
     vote.

     The Parties realize that they have a substantial interest in the effective
     management and operation of SETA. Therefore, the decisions of the Board
     shall whenever possible he made on a unanimous basis after full discussion,
     and the Parties shall instruct their respective Directors on the Board to
     make a good faith effort to resolve any differences and to act unanimously.

     However, should unanimity not be achieved, the following rules shall apply:

     (a)  the Major Decisions as defined in Clause 3.2.4 shall require a "Super
          Majority" vote at the Board of SETA, that is, the affirmative vote of
          at least 6 (six) Directors,

     (b)  the decisions referred to in Clause 3.2.5 shall require a "Simple
          Majority" vote, at the Board of SETA, that is, the affirmative vote of
          at least 4 (four) Directors, and

                                       11

<PAGE>

     (c)  on any resolution proposed to the Board of SETA in relation with ADP
          Ingenerie, Article 156 of the Mexican general law on commercial
          companies shall apply where the Directors appointed by ADP have a
          conflict of interest with SETA and in such case, notwithstanding
          Clause 3.2.4.(t), the decision shall then require the unanimous vote
          of all Directors except Directors appointed by ADP.

     The Board shall implement without a vote all decisions approved by the
     Shareholders in a SETA Shareholders Meeting.

3.2.4 DECISIONS OF THE BOARD REQUIRING SUPER MAJORITY -- MAJOR DECISIONS

     The following acts, expenditures, decisions and obligations to be made or
     incurred by the Strategic Partner (each a "Major Decision") shall require a
     Super Majority vote:

     (a)  organization charts and administrative structure of GCN, of the
          Service Company, and of each of the airports being proposed by the
          Operating Committee of GCN to the board of GCN for approval as
          stipulated in Articles 18 (x) and 28 (4) of the By-laws of the Holding
          Company;

     (b)  appointment or dismissal of :

          i.   the first two levels of the managers of the Holding Company, of
               the Service Company, and of the Airport Concessionaire Companies
               which the year preceding the exercise of the appointment or the
               dismissal have had traffic above 0.3 million passengers per annum
               ("PAX"), subject to the provisions of Clause 4.2.1 hereof and
               Article 29 (2) of the By-laws of the Holding Company.

          ii.  the 13 Administrators of the Airport Concessionaire Comp s
               pursuant to Article 28 (6) of the By-laws of the Holding Company;

     (c)  salary and benefit packages of personnel listed in (b) above, subject
          to the remuneration guidelines imposed by SCT and, following the first
          IPO Nominations and Compensations Committee for the officers of the of
          the Holding Company's subsidiaries, including the General Director and
          the area directors pursuant to Article 29 (3) of the By-laws of the
          Holding Company;

     (d)  general wages and benefits policy of GCN and awarding of bonuses
          pursuant to Article 28 (9) of the By-laws of the Holding Company;

     (e)  appointment or dismissal of the SETA representatives on each of the
          Auditing Committee, the Acquisitions & Agreements Committee and the
          Nominations & Compensations Committee which correspond to 20% of the
          total members on such Committees pursuant to Articles 19 (ii), 29, 31
          and 34 of the By-laws of the Holding Company;

     (f)  voting positions to be taken by the SETA representatives on the
          Committees in (e) above;

                                       12

<PAGE>

     (g)  the presentation to the board of GCN of the Master Development Program
          of GCN proposed by the Operating Committee of GCN and any variation of
          these Master Development Programs pursuant to Article 28 (3) of the
          By-laws of the Holding Company;

     (h)  the presentation to the board of GCN of the annual budget and
          operation plan (the "Annual Budget") which shall be prepared on
          October 31 of each year by the Operating Committee of GCN pursuant to
          Article 28 (1) of the By-laws of the Holding Company, and which shall
          include pro-forma financial statements, production plans, capital
          expenditures with relevant support and materials;

     (i)  the presentation to the board of GCN of the Business Plan which shall
          be prepared by the Operating Committee of GCN pursuant to the By-laws
          of the Holding Company;

     (j)  propose to the Extraordinary Shareholders' Meeting amendments to, or
          termination of, a Major Project Contract subject to the powers of
          shareholders meetings set out in clause 3.1.5.(e);

     (k)  entering into any agreement (whether oral or written) between GCN and
          a shareholder of SETA, any Related Party thereof, including (a)
          contracts for services under the Technical Assistance Agreement and,
          (b) contracts for works under the Project Management Agreement;

     (l)  award of contracts by GCN for works or services to any third party
          with a unit value above:

          i.   US$100,000 for an airport with traffic below 0.3 million PAX in
               the year preceding the award,

          ii.  US$200,000 for an airport with traffic comprised between 0.3
               million and 0.5 million PAX in the year preceding the award,

          iii. US$500,000 for an airport with traffic comprised between 0.5
               million and 1 million PAX in the year preceding the award,

          iv.  US$1 million for an airport with traffic comprised between 1
               million and 3 million PAX in the year preceding the award,

          v.   US$3 million for an airport with traffic above 3 million PAX in
               the year preceding the award,

          vi.  the lower of the aggregate of the amounts set forth in (i)
               through (iv), as applicable, and US$3 million for any group of
               airports, or the Holding Company;

     (m)  asset disposals by GCN with a unit value above the caps set in (l)
          above, but excluding Permitted Investments;

                                       13

<PAGE>

     (n)  finance and lease agreements (including hedging agreements) to which
          GCN is a party with a unit value above the caps set in (l) above
          notwithstanding the powers granted to the board of GCN pursuant to
          Article 17 (11) of the By-laws of the Holding Company;

     (o)  capital investments of GCN with a unit value above the caps set in (l)
          above, but excluding Permitted Investments;

     (p)  granting of GCN guaranties in favor of third parties or between GCN
          companies with a unit value above the caps set in (l) above;

     (q)  entering into a lawsuit with a third party exposing GCN to an
          estimated risk above US$ 200,000 notwithstanding the powers which are
          specifically granted to the board of GCN pursuant to Articles 17 (1)
          and 17 (3) of the By-laws of the Holding Company;

     (r)  defining the tax and accounting policies of SETA and GCN
          notwithstanding the powers of the board of GCN pursuant to Article 17
          (12) of the By-laws of the Holding Company;

     (s)  granting of powers of attorney to third parties to represent GCN
          notwithstanding the powers of the board of GCN pursuant to Article 17
          (1) of the By-laws of the Holding Company;

     (t)  entering into, amending or, terminating any transaction (including the
          opening of bank accounts), agreement or contract (whether oral or
          written) to which SETA is a party, whatever the amount;

     (u)  incurring any expenses or liabilities of any nature whatever the
          amount on behalf of SETA;

     (v)  approval of payment of Audit Mission costs;

     (w)  exercise veto rights on the board of GCN in accordance with the
          Transaction Documents; and

     (x)  amendment or termination of the Operation Agreement except where such
          termination arises by reason of the Operator's default under the
          Operation Agreement, in which case a simple majority approval will
          suffice.

     The approval of the Board of SETA will not be required for transactions of
     a lower amount than indicated above under paragraph (l) through (p).

3.2.5 DECISIONS OF THE BOARD REQUIRING SIMPLE MAJORITY

     All other acts, expenditures, decisions and obligations to be made or
     incurred by GCN which:

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     (a)  are not listed in Clause 3.2.4, and

     (b)  are not expressly included in the powers grunted to the Executive
          Committee pursuant to Clause 4.3.6 herein,

     shall require the Simple Majority vote of the Board of SETA.

3.2.6 ATTENDANCE AND REPORTING OF THE EXECUTIVE COMMITTEE OF GCN

     The three Officers member of the Executive Committee of GCN shall attend
     each SETA Board meeting to jointly report to the Board on the activity of
     GCN since the last Board of SETA meeting or on any other matter which they
     deem important to report to the Board (each Officer acting individually in
     this latter respect). The structure and contents of the activity reports
     shall be decided by Simple Majority vote of the Board.

     When certain sensitive or confidential matters are being discussed by the
     Board, and upon the decision of the Super Majority of the Board of SETA,
     any member of the Executive Committee of GCN may be prevented from
     attending a Board of SETA meeting.

3.2.7 MINUTES

     The Secretary of the Board shall record minutes of any Board meeting and
     shall deliver such minutes to the Parties within (5) five Business Days
     following the date of the meeting. The minutes of a Board meeting shall be
     approved as the first item on the agenda of the following Board meeting.
     The minutes of Board meetings shall be signed by the Chairman of the Board
     and the Secretary of the Board, as well as the Statutory Examiners that
     attended the meeting.

3.2.8 RESOLUTION OF DEADLOCKS

     If, at any time, a Deadlock arises, then the following rules shall apply:

     (a)  within three (3) Business Days of the occurrence of such Deadlock, the
          Parties that have appointed Board Members shall refer the matter
          subject of the Deadlock to their respective Representatives; who shall
          meet and use their best endeavors to resolve the Deadlock within five
          (5) Business Days following such referral, and if the Deadlock is
          resolved by the Representatives, such Representatives shall instruct
          their respective Directors in the Strategic Partner to vote at the
          Board, as agreed by the Representatives, and

     (b)  if the Representatives are unable to resolve the Deadlock, then an
          Extraordinary SETA Shareholder Meeting shall be convened pursuant to
          Clause 3.1.1. and 3.1.5

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<PAGE>

3.2.9 SPECIFIC PROVISIONS IN CONNECTION WITH THE SECURED CREDIT AGREEMENT

If

     (i) the Lender (as such term is defined in the Secured Credit Agreement)
     either:

     or (a) accelerates the Loan (as such term is defined in the Secured Credit
     Agreement.

     or (b) declares an Event of Default (as such term is defined in the Secured
     Credit Agreement) pursuant to Section 8.01 of the Secured Credit Agreement.

     or (c) there shall be commenced or instituted, voluntarily or
     involuntarily, a case in a court or similar competent forum against a Party
     to this agreement seeking the liquidation or reorganization of such Party,
     and, if involuntary, either (i) a determination is made that such Party is
     insolvent or has defaulted in the payment of its obligations generally
     (such as the issuance by a judge of competent jurisdiction (x) in Mexico of
     a resolution opening the concurso mercantile procedure or (y) in France of
     a redressement or liquidation judiciaries) or (ii) the petition commencing
     such involuntary case or proceeding remains undismissed and unstayed after
     such period for dismissal or stay has expired under applicable French or
     Mexican law, or if it requests or accepts the imposition of a conciliador,
     sindico, auditor, receiver, or administrator or if such representative is
     designated or takes possession of such Party, as the case may be, or all or
     a substantial portion of its liabilities and assets; or all or a
     substantial portion of its property, assets or revenues shall be subject to
     bankruptcy proceedings, dissolution or liquidation; or if a Party shall
     cease to operate or shall enter into an agreement for the benefit of its
     creditors or threaten in writing to suspend its operations or a substantial
     portion thereof,

     or (d) if a Party shall, at any time, by virtue of a single event or series
     of events suffer the loss of at least 70% of (x) its paid in capital or (y)
     its assets,

     and

     (ii) Parties holding in the aggregate more than 50% of the Consortium
     Interest (the "Prepayment Parties") have decided and agreed that SETA shall
     pay or otherwise discharge, in full or part, any amounts outstanding under
     the Secured Credit Agreement, including, but not limited to, any then
     outstanding principal, interest and other amounts outstanding under to the
     Secured Credit Agreement (the "Outstanding Amount"),

     then the consent of any other Party (the "Non-Prepayment Parties") or of
     the representatives of such Non-Prepayment Parties on the Board of
     Directors of SETA, notwithstanding any other provision of this Agreement,
     shall not be necessary for SETA to make such prepayment. Notwithstanding
     any other provision of this Agreement, SETA shall sell any available liquid
     asset (but, for the sake of clarity, such liquid assets shall exclude the
     BB Shares owned by SETA) to pay all or any portion of the then Outstanding
     Amount (the amount remaining then to be prepaid being the "Prepayment
     Amount").

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<PAGE>

     After the Prepayment Parties have agreed that SETA shall prepay the
     Prepayment Amount in accordance with the immediately above paragraph, the
     Prepayment Parties may, in addition, determine (a "Determination") that
     SETA will raise additional funds by issuing Consortium Interest (such
     Determination to include whether such Consortium Interest should be in the
     form of Debt Interest, Equity Interest, or a combination thereof, and the
     price and other terms by which SETA will issue any such Consortium
     Interest) or an alternative borrowing (and the price and other terms by
     which SETA will issue any such alternate indebtedness) to pay all of the
     then due Prepayment Amount; provided, however, that (except as specifically
     provided for in the last paragraph of this Clause 3.2.9) any Debt Interests
     issued hereunder shall be allocated among the Parties pari passu with their
     holdings of Consortium Interest, and on similar terms as the Debt Interest
     outstanding at such time (and should there be no Debt Interest outstanding
     at such time, such new Debt Interest will be under similar terms as those
     contained in the Long Term Loan Contracts).

     Upon the Determination to issue Consortium Interest, each of the Parties,
     including the Non-Prepayment Parties, agrees to subscribe for that amount
     of Consortium Interest equal to the product of

          (i) such Party's percentage of the Consortium Interest outstanding
          immediately prior to the issuance of any additional Consortium
          Interest and

          (ii) the then Prepayment Amount

     (hereunder defined as the "Pro Rata Contribution Amount"),

     provided, however, that a Party shall have the right not to subscribe for
     its Pro Rata Contribution Amount (in which case it will be a
     "Non-Subscribing Party"). In the event a Party does not subscribe for its
     Pro Rata Contribution Amount, then each of the other Parties that have
     contributed their Pro Rata Contribution Amount (the "Subscribing Parties")
     shall have the right, but not the obligation, to subscribe for an amount of
     Consortium Interest equal to the product of (i) the Non-Subscribing Party's
     Pro Rata Contribution Amount and (ii) the quotient of (A) such Subscribing
     Party's Consortium Interest and (B) the sum of all other Subscribing
     Parties' Consortium Interest.

     Upon any subscription by the Subscribing Parties of a Non-Subscribing
     Party's Pro Rata Contribution Amount, each of the Parties agrees that, if
     it is a Non-Subscribing Party, it shall sell to each of the Subscribing
     Parties, if necessary, the minimum amount required of its Consortium
     Interest (either, as applicable, in Debt Interest, Equity Interest or a
     combination thereof) so that, after such transfer, the percentage of the
     aggregate amount of Debt Interest it holds shall be equal to the percentage
     of the aggregate amount of Equity Interest it holds, The price that each
     Subscribing Party shall pay For the Non-Subscribing Party's Consortium
     Interest shall be equal to the Fair Market Value, as applicable of the
     Equity Interest or Debt Interest.

     If any applicable law or regulation (including any provision of the
     Documents or the governing instrument of a Party) prohibits the Parties
     applying the immediately preceding

                                       17

<PAGE>

     two paragraphs, then the following provisions shall apply, but only with
     respect to that portion of the Non-Subscribing Party's Consortium Interest
     that applicable law or regulation (including any provision of the
     Transaction Documents or of the governing instrument of a Party) which
     prohibits the Non-Subscribing Party from transferring to the Subscribing
     Party or Parties and only to the extent that this provision (or part
     hereof) does not violate any applicable law or regulation:

          (i) the Prepayment Parties may agree at any time, in lieu of the new
          Debt Interest or Equity Interest to be issued in accordance with the
          previous paragraphs of this Clause 3.2.9, that SETA will issue, and
          the Subscribing Parties will subscribe to, a note or notes (the "New
          Shareholder Debt Interest"), which shall be in the form of a demand
          note that is senior to the Debt Interest of the Parties (for purposes
          hereof, "senior" shall mean that the New Shareholder Debt Interest and
          the interest thereof shall be repaid and paid in full before any
          interest and principal of the Debt Interest may be paid by SETA) and
          carries the same interest rate as the Debt Interest but is subordinate
          to the debt issued pursuant to the Secured Credit Agreement
          ("subordinate" shall mean that all provisions of the Subordination
          Agreement shall be applicable to the New Shareholder Debt Interest as
          if it were Debt Interest thereunder);

          (ii) the Parties agree that, prior to payment in full of the New
          Shareholder Debt Interest, SETA shall make no expenditures except,
          notwithstanding any other provision of this Agreement, either to (A)
          make payments as required under the Secured Credit Agreement and (B)
          make payments to the Parties of Sponsor Shareholder Reimbursable
          Expenses (as such term is defined in the Senior Credit Agreement);

          (iii) to the extent applicable (and with the prior consent of any
          governmental authorities as may be required under the Transaction
          Documents or the governing instrument of a Party), any Non-Subscribing
          Party shall (A) pledge to the Subscribing Parties to secure SETA's
          obligation under the New Shareholder Debt Interest that amount of
          Equity Interest it would have transferred pursuant to the immediately
          preceding paragraph and (B) with the prior consent of the governmental
          authorities as may be required under the Transaction Documents assign
          to the Subscribing Parties the right to vote such Equity Interest and
          receive all dividends and any other distribution hereon; arid (iv) to
          :he extent applicable., any Non-Subscribing Party shall assign to the
          Subscribing Parties the right to receive payments of interest with
          respect to that amount of Debt Interest it would have transferred
          pursuant to the immediately preceding paragraph.

     Notwithstanding any other provisions under this Agreement, at any time with
     six months of the occurrence of the latest of the following, as may be
     applicable under the provisions of this Clause 3.2.9,

     (i) the funding of Equity Interest by the Subscribing Parties,

     (ii) the funding of Debt Interest by the Subscribing Patties,

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<PAGE>

     (iii) the funding of the New Shareholder Debt Interest by the Subscribing
     Parties,

     (iv) the sale at Fair Market Value of Debt Interest by any Non-Subscribing
     Party to the Subscribing Parties pursuant to the above provisions, or

     (v) the sale at Fair Market Value of Equity Interest by any Non-Subscribing
     Party to the Subscribing Parties pursuant to the above provisions,

     each of the Non-Subscribing Parties shall, pursuant to the option agreement
     in the form of Appendix 1 hereto (the "Option Agreement"), have the right
     to repurchase, at a price calculated pursuant to Article 2 of the Option
     Agreement, in a single transaction from the Subscribing Parties

          (i) all (but not less than all) of the Equity Interest and/or the Debt
          Interest purchased by the Subscribing Parties from that
          Non-Subscribing Party and

          (ii) its pro rata share (such pro rata share to be based on the
          Interest held by such Non-Subscribing Party prior to the application
          of any provisions of this Clause 3.2.9) of the New Shareholder Debt
          Interest from the Subscribing Parties

     so that in both cases the Non-Subscribing Party will, after giving effect
     to such purchase, have the financial participation in SETA to which it
     would have been entitled had it been a Subscribing Party hereunder.

3.2.10 TRANSFER IN CASE OF REORGANIZATION OR LIQUIDATION OF A PARTY

     Each of the Parties hereto agrees and covenants that if

     (a) there shall be commenced or instituted, voluntarily or involuntarily, a
     case in a court or similar competent Forum against a Party to this
     agreement seeking the liquidation or reorganization of such Party, and if
     involuntary, either (i) a determination is made that such Party is
     insolvent or has defaulted in the payment of its obligations generally
     (such as the issuance by a judge of competent jurisdiction (x) in Mexico of
     a resolution opening the concurso mercantil procedure or (y) in France of a
     redressement or liquidation judiciaries) or (ii) the petition commencing
     such involuntary case or proceeding remains undismissed and unstayed after
     such period for dismissal or stay has expired under applicable French or
     Mexican law, or

     (b) if it requests or accepts the imposition of a conciliador, sindico,
     auditor, receiver or administrator or if such representative is designated
     and takes possession of such Party, as the case may be, or

     (c) all or a substantial portion of its liabilities and assets, or all or a
     substantial portion of its property, assets or revenues shall be subject to
     bankruptcy proceedings, dissolution or liquidation; or

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<PAGE>

     (d) if a Party shall cease to operate or shall enter into an agreement for
     the benefit of its creditors or threaten in writing to suspend its
     operations or a substantial portion thereof; or

     (e) if a Party shall, at any time, by virtue of a single event or series of
     events suffer the loss of at least 70% of (x) its paid in capital or (y)
     its assets,

     then the other Parties hereto shall have the right, but not the obligation,
     to purchase from such Party (the "Defaulting Party") and each Party if it
     is the Defaulting Party hereby agrees to sell all or part of its Consortium
     Interest to such non-defaulting Parties for a price equal to the Fair
     Market Value of such Consortium Interest. If any applicable law or
     regulation (including any provision of the Transaction Documents or the
     governing instrument of a Party) prohibits the Parties from applying this
     Clause 3.2.10, then the Parties hereto agree that the non-defaulting
     Parties shall have the right to assign to any third party this right to
     purchase and to enforce the obligation to sell contained herein.

3.2.11 PREPAYMENT OF THE LOAN

     The Parties hereto may decide at any time that SETA shall prepay the
     Outstanding Amount of the Loan (as defined in the Senior Secured Credit
     Agreement). Except as otherwise provided for in Clause 3.2,9, such a
     decision shall require the unanimous consent of the Parties.

3.2.12 JOINT LIABILITY

     (a)  AEROINVEST, CICASA and COINSA undertake that they are and shall remain
          fully and jointly responsible for the due performance of any and all
          obligations contained in this Consortium Agreement, the Transaction
          Documents and the Secured Credit Agreement, as amended from time to
          time.

     (b)  Vinci and VASA undertake that they are and shall remain fully and
          jointly responsible for the due performance of any and all obligations
          contained in this Consortium Agreement, the Transaction Documents and
          the Secured Credit Agreement, as amended from time to time.

3.2.13 OPERATING AGREEMENT LETTERS

     It is understood and agreed that the Operating Agreement Letters (as
     defined in the Secured Credit Agreement) and any other documents related to
     them shall be considered as part of the Transaction Documents, such as
     defined in the Participation Agreement or in the Consortium Agreement.

3.3  STATUTORY EXAMINERS OF SETA

     The surveillance of SETA shall be entrusted to a permanent examiner and an
     alternate examiner or external auditor, to be appointed by the Board of
     SETA pursuant to Clause 3.2.4 (b). Such appointment hall reside in a
     partner of a firm or office of certified public accountants which shall act
     as the external auditors of SETA, and shall prepare the

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<PAGE>

     information for the annual reports, certifying the general balance sheet
     and the profits and losses statements for each fiscal year.

IV.  MANAGEMENT OF GCN - DESIGNATIONS OF DIRECTORS, COMMITTEE MEMBERS AND
     OFFICERS IN GCN

     In accordance with the Transaction Documents, certain members designated by
     SETA shall participate in the management and operation of GCN at the GCN
     board of directors, Operating Committee, Executive Committee, Contracts and
     Acquisitions Committee, Audit Committee, Nomination and Compensation
     Committee and the Officers, as well as the Managers of GCN's subsidiaries.
     In accordance with their rights to designate members of GCN management
     conferred in the Transaction Documents, the Parties agree to the rules set
     forth below with respect to each Party's right to make different level
     designations in GCN. If the number of members of the management to be
     designated by the Parties changes, each Party shall use its best efforts to
     reach an agreement satisfactory to the other Parties, trying to maintain as
     much as possible equal participation in each area of the management levels
     of GCN or GCN's subsidiaries.

4.1  APPOINTMENT OF MEMBERS OF GCN'S BOARD OF DIRECTORS

4.1.1 Pursuant to Article 6.3(a) of the By-laws of the Holding Company and
     Section 2.8 of the Participation Agreement, the Strategic Partner is
     entitled to appoint three members of GCN's board of directors and their
     respective alternates. Consequently the Parties hereby agree that such
     appointment shall be made as follows:

     (a)  ADP shall designate (1) one member and the corresponding alternate,

     (b)  AEROINVEST shall designate (1) one member and the corresponding
          alternate, and

     (c)  VASA shall designate (1) one member and the corresponding alternate.

     The Parties hereby agree that the three directors of the board of GCN
     appointed by SETA shall not be Officers of GCN. The Parties further agree
     that these three directors shall be Directors of the Board of SETA.

4.1.2 To nominate a Director of the board of GCN, a shareholder of SETA shall
     own at least 25.5% of the stock of SETA.

     If only two shareholders of SETA own each at least 25.5 % of the stock of
     SETA, then these two shareholders will jointly nominate the third Director
     of the board of GCN, and his corresponding alternate.

     If only one shareholder of SETA owns at least 25.5 % of the stock of SETA,
     then it will nominate all three Directors on the Board of GCN, and their
     corresponding alternates.

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<PAGE>

4.1.3 The three Directors of GCN appointed by SETA shall vote (including use of
     veto) at the board of GCN in strict compliance with the decisions made by
     the Board of SETA to the extent the item on the agenda of the GCN board
     meeting falls within the powers of the Board of SETA. For all other items
     (including use of veto), the 3 directors shall consult each other and
     decide on a common position before expressing their views on the board of
     GCN and before proceeding to any vote (including use of veto). In the event
     they are unable to reach a common position, they will attempt to delay the
     decision on the board of GCN in order to obtain instructions from the
     shareholders of SETA.

4.2  APPOINTMENT OF GCN'S OFFICERS AND MEMBERS OF THE OPERATING COMMITTEE

4.2.1 Pursuant to Article 19 of the By-laws of the Holding Company and Section
     2.8.2 of the Participation Agreement, the directors appointed by the
     Strategic Partner on the Board of GCN shall be entitled to appoint certain
     of the Officers. Therefore, the Parties hereby agree that such appointments
     shall be made as follows:

     (a)  the General Director of GCN shall be appointed by AEROINVEST with the
          prior approval of ADP and VASA which may not be unreasonably withheld,

     (b)  the Chief Financial & Administration Manager of GCN shall be appointed
          by VASA, with the prior approval of ADP and AEROINVEST which may not
          be unreasonably withheld, and

     (c)  the Chief Operations & Commercial Development Manager of GCN shall be
          appointed by ADP, with the prior approval of AEROINVEST and VASA,
          which may not be unreasonably withheld.

4.2.2 The following three managers shall be appointed by the board of GCN;
     initially by SCT and, following the full IPO, by simple majority vote (i.e.
     51%) of the board of GCN:

     (a)  the Chief Safety and Quality Control Manager,

     (b)  the Chief Human Resources Manager, and

     (c)  the General Counsel.

     The Directors appointed by the Parties at the Board of GCN shall vote as
     regards such appointments in accordance with a decision taken by the Board
     of SETA in accordance with Clause 3.2.3(a).

4.2.3 the Chief Maintenance and Infrastructure Development Manager of GCN shall
     be appointed by the Board of SETA in accordance with Clause 3.2.3 (a). He
     shall not be a member of the Operating Committee of GCN.

4.2.4 The Parties hereby agree that:

     (a)  those Officers appointed according to Clause 4.2.1 hereof shall be the
          members of the Operating Committee of GCN nominated by SETA pursuant
          to Article 19 of

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<PAGE>

          the By-laws of the Holding Company and Section 2.8.2 of the
          Participation Agreement;

     (b)  the managers of GCN appointed according to Clauses 4.2.1, 4.2.2 and
          4.2.3 hereof shall be the Officers. If the proposed Administrative
          Structure of GCN is not accepted by SCT, each Party shall use its best
          efforts to reach an agreement satisfactory to the other Parties,
          trying to maintain as much as possible the principle of specialization
          in designating GCN's Officers;

     (c)  GCN's Officers appointed by the Strategic Partner may not be:

          i.   directors on the Board of SETA,

          ii.  directors on the board of GCN,

          iii. managers of the Strategic Partner;

     (d)  at the written request of any two Parties, any Officer shall be
          dismissed. Any such Officer so dismissed shall be replaced in
          accordance with this Clause 4.2;

     (e)  if a person is an employee of either AEROINVEST, ADP or VASA, such
          person shall terminate his relationship with his employer as a
          condition precedent to becoming an employee of GCN, whatever the
          position he shall assume in GCN may be;

     (f)  on a day-to-day basis, and subject to the rules applicable to the
          Operating Committee in the Transaction Documents, the Chief Operations
          & Commercial Development Manager, the Chief Financial & Administration
          Manager and the Chief Maintenance and Infrastructure Development
          Manager shall report to the General Director. Subject to Article 29.3
          of the By-laws of the Holding Company and Article 3.1.1 of the
          Shareholders Agreement, their remuneration package shall be initially
          set by the Board of SETA in agreement with the General Director who
          shall perform their annual reviews.

4.3  THE EXECUTIVE COMMITTEE OF GCN

4.3.1 FREQUENCY AND NOTICES

     The Executive Committee will meet at any location and as often as
     necessary. The members of the Executive Committee shall use their best
     efforts to work as a team and, therefore, shall meet informally when
     necessary. However, the Committee shall meet upon request, whether written
     or oral, of one of the members and the other two members shall use their
     best efforts to accommodate their agenda in order to allow the Committee
     meeting to be held as soon as possible, but in any event not later than
     within 5 (five) Business Days following the date of the request.

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<PAGE>

4.3.2 MEMBERS

     (a)  The Executive Committee shall consist of the three Officers appointed
          by the shareholders of SETA in accordance with Clause 4.2.1.

     (b)  The chairman of the Executive Committee shall he the General Director
          of GCN. The chairman of the Executive Committee shall not have a
          casting vote.

4.3.3 QUORUM AND VOTING RULES

     (a)  The Executive Committee will hold meetings only if all three members
          are able to attend physically. Presence by proxy shall not be
          permitted.

     (b)  If the quorum fails to be reached or the meeting is postponed, the
          chairman of the Executive Committee shall schedule another meeting of
          the Executive Committee to be held within the next five Business Days
          or as otherwise agreed by the three Officers.

     (c)  The Parties realize that they have a substantial interest in the
          effective and efficient management and operation of GCN. Therefore,
          the decisions of the Executive Committee shall, whenever possible, be
          made on a unanimous basis after full discussion, and the Parties shall
          instruct their respective Officers to make a good-faith effort to
          resolve any differences and to act unanimously.

     (d)  However, should a disagreement arise on a matter discussed during a
          meeting of the Executive Committee, a vote among the three members
          shall take place. The decision to resolve such matter shall be a
          decision approved by at least two of the three Officer members of the
          Executive Committee. In addition, the General Director will have the
          right to veto a decision proposed by the two other Officers of the
          Committee.

     (e)  If a decision to resolve a matter of disagreement cannot be made such
          that it is supported by at least two of the three Officers of the
          Committee (notwithstanding any veto of the General Director), then
          such matter of disagreement will be referred to the Board of SETA who
          shall proceed as follows :

          i.   the disagreement shall be discussed and, if necessary, put to
               vote during the next scheduled Board meeting of SETA, unless the
               dispute requires an urgent resolution (which it will be deemed to
               do if at least one of the Officers of the Executive Committee
               sends a written notice to the Chairman of the Board of SETA to
               this effect), in which case the Chairman of the Board shall send
               within the next two Business Days a written notice to the
               Directors and the Board shall meet not later than 10 Business
               Days following the date of the notice,

          ii.  the decision to resolve the disagreement shall be taken by Simple
               Majority vote of the Board pursuant to Clause 3.2.5 unless the
               matter subject of the disagreement calls for a Major Decision,
               and

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<PAGE>

          iii. the decision to resolve the disagreement shall be taken by Super
               Majority vote of the Board pursuant to Clause 3.2.4 if the matter
               subject of the disagreement calls for a Major Decision.

4.3.4 OMITTED

4.3.5 REPORTING

     The Executive Committee shall report to the Board of SETA in accordance
     with Clause 3.2.6 hereof.

4.3.6 POWERS OF THE EXECUTIVE COMMITTEE

     The Executive Committee shall participate in the management and operation
     of GCN subject to the powers of the Board of SETA, the Board of GCN or the
     Board of any of the Subsidiaries, as the case may be. The Executive
     Committee shall have the following powers:

     (a)  together with the Operating Committee, recommend the appointment or
          the dismissal of employees of GCN other than those that are to be
          appointed by the shareholders of SETA pursuant to Clause 3.2.4(b). The
          Officers of the Executive Committee shall agree on a common view with
          respect to any appointment prior to expressing such view as members of
          the Operating Committee and making any proposal to the Nominations and
          Compensations Committee;

     (b)  together with the Operating Committee, determine the level of the
          remuneration of the employees referred in (a) above pursuant to
          Section 2.4.1 of the Administrative Services Rendering Agreement, but
          subject to the general wages and benefits policy approved by the Board
          of SETA pursuant to Clause 3.2.4 (d) hereof;

     (c)  recommend the policy related to the bank accounts of GCN or the
          payments on behalf of GCN, it being understood that signing powers
          should be delegated on the principle of double signature, where the
          signature of the Chief Financial Officer & Administrative Manager (or
          of an employee of the treasury department of GCN to whom his powers
          have been delegated) will always be required. Further, any debit in
          excess of:

          i.   US$2,000 for an airport with traffic below 0.5 million PAX in the
               year preceding the year in which the debit is made and for any
               expense of the Holding Company or the Service Company,

          ii.  US$5,000 for an airport with traffic comprised between 0.5
               million and 1 million PAX in the year preceding the year in which
               the debit is made,

          iii. US$10,000 for an airport with traffic comprised between 1 million
               and 3 million PAX in the year preceding the year in which the
               debit is made,

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<PAGE>

          iv.  US$20,000 for an airport with traffic above 3 million PAX in the
               preceding the year in which the debit is made,

          shall require the sign-off of a member of the Executive Committee;

     (d)  together with the Operating Committee, lead the formulation of the
          Master Development Program, the Business Plan and the Annual Budget to
          be submitted to the Board of GCN as per the Transaction Documents, it
          being understood that the Executive Committee shall seek the prior
          approval of the Board of SETA in accordance with Clauses 3.2.4 (g) and
          (h) hereof before their submission to the Board of GCN;

     (e)  together with the Operating Committee, submit for approval to the
          Board of GCN the dividend policy, it being understood that the
          Executive Committee shall seek the prior approval of the shareholders
          of SETA in accordance with Clause 3.1.4(e) before such policy is
          submitted to the Board of GCN;

     (f)  exercise the powers of the General Director referred to in Articles
          17, 18 and 19 of the By-laws of the Service Company. The General
          Director shall at all times act in accordance with this Agreement;

     (g)  subject to the powers of the board of GCN outlined in Article 18 of
          the By-laws of the Holding Company and the powers of the Operating
          Committee outlined in Article 28 of the same, propose, recommend or
          execute all actions, agreements, contracts and transactions, the
          implementation of which does not require the prior approval of the
          Board of SETA pursuant to Clause 3.2 above.

     In the event the three Officers are unable to agree on a course of action,
     the provisions under Clause 4.3.3 (d) and (e) hereof shall apply.

The Executive Committee of GCN shall have the right to act freely and swiftly in
the event of an emergency relating to safety, security, protection of the
environment of the Airports, their personnel and clients.

4.4  APPOINTMENT OF MEMBERS OF GCN'S OTHER COMMITTEES

     Pursuant to Articles 29, 31 and 34 of the By-laws of the Holding Company,
     the Strategic Partner is entitled to appoint 20% of the respective members
     of (i) the Nominations and Compensations Committee, (ii) the Audit
     Committee, and (iii) the Acquisitions and Agreements Committee.
     Consequently, the Parties hereby agree that such appointments shall be made
     as follows:

4.4.1 NOMINATIONS AND COMPENSATION COMMITTEE.

     The Strategic Partner's members of the Nominations and Compensations
     Committee shall be appointed unanimously by the Parties.

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4.4.2 AUDIT COMMITTEE

     The Strategic Partner's members of the Audit Committee shall be appointed
     unanimously by the Parties.

4.5  ACQUISITIONS & AGREEMENTS COMMITTEE

     The Strategic Partner's members of the Acquisitions and Contracts Committee
     shall be appointed unanimously by the Parties.

V.   STRUCTURE AND CAPITALIZATION OF THE STRATEGIC PARTNER

5.1  CORPORATE STRUCTURE

5.1.1 BY-LAWS AND SHAREHOLDERS' AGREEMENT OF THE STRATEGIC PARTNER

     The Parties shall use their best efforts to always keep the most
     appropriate legal structure in order to have, in proportion to their
     respective Interest in the Strategic Partner (as this may vary from time to
     time) but always subject to equal Transfer Restrictions and Extended
     Transfer Restrictions between the Parties, the same rights and Obligations
     (but subject to Clause 10.2.3 as the case may be) with respect to the
     Mexican Government, the NAFIN Trust , GCN and GCN's subsidiaries,
     notwithstanding any difference established by SCT between Key Partners and
     the Investment Partners as provided for in the Transaction Documents and/or
     any differences in their Interest. Best efforts shall include the possible
     setting up of trust agreements or intermediary corporate entities to hold
     the shares of the Strategic Partner. In any event, all rights and
     Obligations applicable to the Key Partners and the investment Partner in
     accordance with the Transaction Documents shall be jointly and severally
     assumed by all Parties. Each Party shall do everything that is reasonably
     requested by the other Parties to comply with all Tender conditions and
     requirements.

5.1.2 STRATEGIC PARTNER BANK ACCOUNT

     Upon its formation, the Strategic Partner opened a bank account (the
     "Strategic Partner Bank Account") in a bank agreed by the Parties. Each
     Party shall designate a person authorized to sign and give instructions on
     the Strategic Partner Bank Account. The Parties establish that:

     (a)  any withdrawal from the Strategic Partner Bank Account shall require
          the signatures of at least two Parties, and

     (b)  any withdrawal in excess of US$100,000 (one hundred thousand U.S.
          dollars) shall require the signature of all three Parties.

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5.2  OMITTED

5.3  CAPITALIZATION OF THE STRATEGIC PARTNER

5.3.1 INTERESTS IN THE STRATEGIC PARTNER

Upon full payment by the Parties for the Interests, such Parties received from
the Strategic Partner:

     (i)  a certificate, comprising the number of Shares subscribed and paid
          for, which satisfies the requirements set forth in Article 125 of the
          Mexican General Corporation Law, and

     (ii) a copy of the Stock Registry Book of the Strategic Partner certified
          by the Secretary of the Board of SETA, specifying that the relevant
          Shares have been paid for, released to and are owned by the applicable
          Party.

5.3.2 NO LIENS

     The documents representing the Parties' Interests, shall be duly and
     validly issued common shares or beneficiary rights of the Strategic
     Partner, with full voting rights, and shall be issued free and clear of
     liens. In accordance with Clause 7.4 hereof, a Party shall not pledge the
     Shares or create any liens to acquire such Shares without the consent of
     the other Parties.

VI.  OMITTED

VII. TRANSFER, SALE OF SHARES AND PREEMPTION RIGHTS

7.1  TRANSFER, SALE OF SHARES AND PREEMPTION RIGHTS

7.1.1 NOTIFICATION

     Any Party wishing to sell or transfer all or part of its Shares in the
     Strategic Partner (the "Seller") must notify the Board of SETA, by letter
     addressed to its Chairman (the "Sale Notice"), of the following:

     (a)  the identity of the proposed purchaser and of its immediate
          shareholders,

     (b)  the number of Shares which the Party proposes to transfer (the
          "Offered Shares"),

     (c)  the conditions of the sale,

     (d)  the proposed price per Share of the sale, unless the proposed sale or
          transfer falls within the provisions of Clause 7.1.2 hereof.

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7.1.2 TRANSFER OR SALE OF SETA SHARES TO RELATED PARTIES

     Any Party may sell or transfer, totally or partially, at any time its
     Interest to such Party's Related Party, provided that: a) such sale or
     transfer complies with provisions of the Participation Agreement and b) the
     capital stock of such Party's Related Party may not be sold to a third
     party without the prior written agreement of the other Parties, unless such
     Party's Related Party owns not less and not more than 25.5% of the capital
     stock of SETA.

     If the Party's Related Party owns not less and not more than 25.5% of the
     capital stock of SETA, then the amount of the capital stock issued by such
     Party's Related Party which may be sold shall not exceed 34.9%. In order
     for more than 34.9% of the issued capital stock of such Party's Related
     Party to be sold to a third party, the prior and unanimous written
     agreement of the Parties shall be required. The purchaser of the shares
     issued by such Party's Related Party shall not be entitled to vote any of
     such Related Party's Shares in SETA, nor shall the purchaser of the shares
     issued by such Party's Related Party have the right to appoint any members
     to the Board of SETA, except with the unanimous approval of the other
     Parties which approval shall not be unreasonably withheld.

     Furthermore, the following conditions precedent shall apply to such sale or
     transfer:

     (a)  the Seller has notified the Board of SETA pursuant to Clause 7.1.1
          hereof; and

     (b)  such Party's Related Party executes and delivers to SETA and all the
          Parties hereto an instrument agreeing to be bound by the terms of this
          Agreement, the Transaction Documents and the documents governing SETA.

     The Parties agree that in the event that any of them should transfer or
     sell partially or totally to a Related Party the shares representing the
     common stock of the Strategic Partner, such transfer, sale or assignment
     shall encompass not only the corporate rights attached to the shares but
     also the same respective percentage, based on the number of shares
     transferred or sold, of the outstanding loans granted by the shareholders
     to the Strategic Partner on the date of the share transfer. To such effect,
     the Parties agree that the transferring party, the purchaser and the
     Strategic Partner shall upon transfer execute an assignment agreement
     providing for such assignment of the credit rights. Parties within this
     amendment agree that the foregoing rule shall also apply in the same sense
     in the case that the outstanding loans' credit rights should be assigned or
     sold partially or totally to a Related Party.

7.1.3 TRANSFER OR SALE OF SETA SHARES TO A NOM-RELATED PARTY

     No Party shall transfer or sell, totally or partially, its Interest to a
     third party being a non-Related Party without the prior written and
     unanimous consent of the other SETA Shareholders unless:

     (a)  the Seller has proceeded in strict accordance with the provisions of
          Clauses 7.1.1 and 7.1.4 hereof,

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     (b)  the provisions of Clause 7.1.5 below do not apply, and

     (c)  the non-Related Party which shall acquire the Offered Shares or to
          which the Offered Shares shall be transferred has signed an instrument
          whereby it agrees to be bound by the terms of this Agreement, the
          Transaction Documents and the documents governing SETA.

     The Parties agree that in the event that any of them should transfer or
     sell partially or totally to a Non-Related Party the shares representing
     the common stock of the Strategic Partner, such transfer, sale or
     assignment shall encompass not only the corporate rights attached to the
     shares but also the same respective percentage, based on the number of
     shares transferred or sold, of the outstanding loans granted by the
     shareholders to the Strategic Partner on the date of the share transfer. To
     such effect, the Parties agree that the transferring party, the purchaser
     and the Strategic Partner shall upon transfer execute an assignment
     agreement providing for such assignment of the credit rights. Parties
     within this amendment agree that the foregoing rule shall also apply in the
     same sense in the case that the outstanding loans' credit rights should be
     assigned or sold partially or totally to a Non-Related Party.

7.1.4 PREEMPTION RIGHTS

     The following provisions shall apply to any sale of Offered Shares other
     than a sale in conformity with Clause 7.1.2:

     (a)  Not later than five Business Days following the receipt of the Sale
          Notice, the Board of Directors shall send a copy thereof to all the
          other Shareholders of SETA.

     (b)  Any one or more of the other SEATA Shareholders shall thereupon be
          entitled to purchase the Offered Shares on the same terms and
          conditions as specified in the Sale Notice, provided that, if more
          than one SETA Shareholder proposes to exercise this right and such
          SETA Shareholders together wish to purchase a number of Shares in
          excess of the number of the Offered Shares, the Offered Shares shall
          be allotted among such SETA Shareholders pro rata to their existing
          respective shareholdings;

     (c)  Not later than eight Business Days following receipt of the copy of
          the Sale Notice, the SETA Shareholders willing to exercise their
          preemption right shall notify such willingness in writing to the
          Chairman of the Board of SETA;

     (d)  At the end of the period referred to in paragraph (c) above, the Board
          of SETA shall forthwith inform the Seller in writing of the following:

          i.   the identity of the SETA Shareholders willing to exercise their
               preemption right,

          ii.  the number of Offered Shares which each SETA Shareholder wishes
               to purchase,

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          iii. the period for completion of the sale, which shall not exceed 40
               Business Days after the date of the receipt of the Sale Notice
               subject to any governmental notification or approval.

     (e)  If the other SETA Shareholders do not propose to exercise their
          preemption right in respect of all of the Offered Shares, the Seller
          shall be entitled to sell all, but not some, of the balance of the
          Offered Shares (the "Balance of Shares") to the proposed purchaser
          specified in the Sale Notice provided that:

          i.   such sale is completed within a maximum period of 30 Business
               Days starting from the date at which the Seller was informed that
               all the Offered Shares would not be purchased by the other
               Parties, and

          ii.  the third party purchaser shall execute and deliver to the
               Strategic Partner and all Parties an instrument agreeing to be
               bound by the terms of this Agreement, the Transaction Documents
               and the documents governing SETA.

     (f)  If:

          i.   the other SETA Shareholders do not propose to exercise their
               preemption rights or propose to exercise them in respect of only
               part of the Offered Shares, and

          ii.  thereafter, the Seller fails to complete the sale of all or the
               Balance of Shares to the third party purchaser at the conditions
               specified in the Sale Notice,

          then the Sale Offer shall be canceled provided that the Seller may
          submit a new Sale Offer in full compliance with the procedure stated
          in this Agreement.

     (g)  Any SETA Shareholder who proposes to exercise its preemption right or,
          if no SETA Shareholder proposes to exercise such right, the proposed
          purchaser will be required to abide by the terms of Clause 7.1.2,
          which provides for the obligation to assign to the purchaser credit
          rights of the Seller against [to] the Strategic Partner along with the
          transfer of shares.

7.1.5 EXTENDED TRANSFER RESTRICTIONS

     In addition to the provisions of Section 2.4 of the Participation Agreement
     which restrict the sale of Shares of SETA, the Parties hereby agree to
     comply with the following additional restrictions (the "Extended Transfer
     Restrictions"):

     (a)  VASA may not decrease its Interest in the Strategic Partner below
          25.5% without the prior written consent of the other Shareholders of
          SETA , as stated in Clause 3.1.5 (a);

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<PAGE>

     (b)  to the extent the Technical Assistance and Technology Transfer
          Agreement remains in full force and effect, including in circumstances
          where the term of such Agreement would have been automatically renewed
          pursuant to Section 5.2 of said Agreement, a Party may not decrease
          its Interest in the Strategic Partner below 25.5% without the prior
          written consent of the other Shareholders of SETA, as outlined in
          Clause 3.1.5 (b), and

     (c)  subject to the provisions of this Clause VII, the capital stock of
          SETA shall not be held by more than two subsidiaries of any Party.

7.1.6 CONSEQUENCES OF THE TRANSFER OR SALE OF SHARES

     For the avoidance of doubt, the transfer or sale of Shares in the Strategic
     Partner shall have, inter alia, the following consequences:

     (a)  the right of the Seller to receive its share of the Management Fee
          shall decrease in the same proportion as its Interest in the Strategic
          Partner, and

     (b)  the right of the Seller to receive its share of any proceeds from the
          Option Agreement shall decrease in the same proportion as its Interest
          in the Strategic Partner.

7.2  NEGATIVE PLEDGE

     The Parties hereby agree that they shall not pledge or create any other
     form of encumbrance on their Shares in the Strategic Partner without the
     prior written and unanimous consent of the other Parties.

VIII. PROJECT MANAGEMENT AGREEMENT

8.1  PROJECT MANAGEMENT AGREEMENT

     The Parties hereby agree to enter into a project management agreement (the
     "Project Management Agreement") the terms and conditions of which are
     outlined below.

8.2  EXCLUSIVE COLLABORATION

     The Parties agree to:

     (a)  grant each other exclusivity, and

     (b)  to combine their engineering and project management capabilities,

     in order to bid for all maintenance, engineering, design, construction,
     aeronautical, commercial or marketing contracts which will be tendered by
     GCN in accordance with the Transaction Documents and to secure for them the
     highest probability of winning.

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<PAGE>

     As and when each contract will be tendered by GCN, and subject to the
     provisions below, the Parties will form a consortium to bid for such
     contract which complies with the bylaws of each Party.

8.3  PARTICIPATION

8.3.1 RIGHT TO PARTICIPATE AND LEVEL OF PARTICIPATION

     Each Party shall have the right, but not the obligation, to participate in
     the consortium formed to bid for each contract.

     The Parties hereby agree that:

     (a)  AEROINVEST will have a right to participate in each contract with a
          share equal to 40%,

     (b)  ADP will have a right to participate in each contract with a share
          equal to 30%, and

     (c)  VASA will have a right to participate in each contract with a share
          equal to 30%,

     it being understood that each Party will have the right to reduce the level
     of its participation at its sole discretion.

     If a Party decides not to participate for its full participation (as stated
     above) in a consortium to bid for a contract, then the difference between
     its actual participation and the level stated above shall be shared equally
     among the two other Parties (who shall have the right but not the
     obligation to take such additional participation in their sole discretion).

8.3.2 OPTIONAL WITHDRAWAL

     If one or more Parties decide not to participate in the tender phase of a
     contract, it (they) shall notify in writing the other Parties not later
     than 30 Business Days prior to the bid date. In such case, the withdrawing
     Party(ies) will undertake not to participate in any manner whatsoever in a
     competing consortium or compete on its own against the remaining Party(ies)
     for the award of the contract being tendered.

     In such case, the share of the withdrawing Party shall be shared equally
     between the two other Parties, subject to the provisions of Clause 8.3.1
     hereof.

8.3.3 SERVICES AT COST

     The Parties agree that:

     (a)  to prepare a bid for a contract tendered by GCN, and

     (b)  to execute such contract after award,

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<PAGE>

     they shall perform and bill their work, services and transfer of know-how
     at cost to the consortium, which they have agreed to form for the purpose
     of the bid and execution of the contract, subject to any transfer pricing
     tax implication as agreed by the Parties.

     "At cost" shall mean that the amounts billed shall exclude any profit
     margin and shall have been approved by the Parties with unanimous consent
     prior to being incurred.

8.3.4 PROFIT SHARING

     Any profit margin earned by the Parties under the execution of a contract
     will be shared by the Parties according to their participation in the
     consortium formed to bid for such contract. The profit margin shall be
     obtained after deducting costs in accordance with Clause 8.3.3 above.

8.3.5 DECISION MAKING

     For each bid preparation, all decisions on key matters (with the exception
     of the decision of each Party to participate and the level of its
     participation within the caps outlined in Clause 8.3.1 hereof) shall be
     taken on the basis of unanimity of the participating Parties; decisions on
     key matters shall include, inter alia:

     (a)  the key terms and conditions of the offer,

     (b)  the appointment of the project manners,

     (c)  the budgets,

     (d)  subcontracting, and

     (e)  the legal and contractual structure of the transaction.

IX.  RENDERING OF SERVICES AND TECHNICAL ASSISTANC

9.1  OMITTED

9.2  SERVICES AND TECHNICAL ASSISTANCE

     The Parties shall provide a full description of the services to be provided
     by each Party once the complete range of services required by the Technical
     Assistance and Technology Transfer Agreement and the Administrative
     Services Rendering Agreement, to be executed by the Strategic Partner is
     known. The Parties shall use their best efforts to share the provision of
     technical assistance services in respect of the description of the services
     provided in Exhibit B hereof, and to minimize the cost of such services.

     Descriptions of the services to be provided by each Party in connection
     with the Technical Assistance and Technology Transfer Agreement, the
     Administrative Services Rendering Agreement and the Industrial Property
     Right utilized in the rendering of such services are contained in Exhibit
     B.

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9.3  PRICES & SHARING OF THE MANAGEMENT FEE

     Each Party shall bill its services to the Strategic Partner at previously
     and unanimously agreed costs. Staff costs and other External Costs shall be
     repaid to the Parties if properly incurred in accordance with this
     Agreement.

     The remaining part of the Management Fee will be shared between the Parties
     according to their Interest in the Strategic Partner, and subject to Clause
     7.1.6 after the deduction of a margin of 10% of the value of the services
     provided by ADP, for the relevant period of apportionment of the Management
     Fee. The Parties agree that subject to legal review, they shall provide
     their services and receive the Management Fee through a technical services
     contract with the Strategic Partner.

X.   LIABILITY & DEFAULT

10.1 LIABILITY TO THIRD PARTIES

     The liability of the Parties towards any third party shall not be joint and
     several, except in the following cases:

     (a)  in the agreements signed by the Lead Firm with external consultants or
          advisors pursuant to approvals granted in accordance with Clause
          2.1.3(j) and which are binding for all Parties,

     (b)  with respect to the Obligations under the Tender and Transaction
          Documents, including the liabilities applicable to the Key Partners
          and the Investment Partner under the Technical Assistance Agreement,
          and in such case Clause 10.2 shall apply,

     (c)  as and when the Parties agree unanimously and in writing to accept
          joint and several liability,

     (d)  as provided under Clause 3.2.12 CICASA, and COINSA shall be jointly
          and severally liable in connection with the due performance by
          AEROINVEST of any and all of its obligations under this Consortium
          Agreement, the Transaction Documents and the Secured Credit Agreement,
          as amended from time to time,

     (e)  as provided under Clause 3.2.12,, Vinci shall be jointly and severally
          liable in connection with the due performance by VASA of any and all
          of its obligations under this Consortium Agreement, the Transaction
          Documents and the Secured Credit Agreement, as amended from time to
          time.

     Under all other circumstances, the obligations of the Parties towards third
     parties shall be several.

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10.2 DEFAULT

10.2.1 OMITTED

10.2.2 DEFAULTS UNDER THIS AGREEMENT

     In the event of a default of one of the Parties, or any of its
     subsidiaries, affiliates, employees or legal representatives under this
     Agreement, other than under Clause 10.2.3,, such Party shall be liable to
     the other Parties for any damages suffered by them.

10.2.3 DEFAULT UNDER THE TRANSACTION DOCUMENTS

     Subject to the provisions of Section 10.3 below, in the event of a default
     (a "Transaction Documents Default") under the Transaction Documents of one
     of the Parties or any of its subsidiaries, affiliates, employees or legal
     representatives (but excluding employees or legal representatives of the
     Parties who are permanently on the payroll of SETA or GCN in respect of the
     Obligations) (each a "Transaction Document Defaulting Party"), such
     Transaction Document Defaulting Party shall solely bear the consequences of
     the Transaction Documents Default, including any costs, expense and damages
     incurred by the other Parties arising from such Transaction Documents
     Default.

10.2.4 CURE PERIOD

     A default by a Party (the "defaulting Party") shall be deemed to have
     occurred under Clauses 10.2.2 and 10.2.3 hereof if, within fifteen (15)
     Business Days of the defaulting Party's receipt of a written notice from
     any of the other Parties (the "non-defaulting Party"), the defaulting Party
     has not cured a breach under this Agreement or any of the Transaction
     Documents, as the case may be.

     If there is any disagreement with respect to the occurrence of default, the
     dispute resolution procedures of Clause 13.4 below shall apply.

10.2.5 CONSEQUENTIAL DAMAGES.

     No Party shall be liable to another for consequential damages under this
     Agreement except for such consequential damages that arise from such
     Party's willful misconduct and/or gross negligence.

10.3 LIABILITY UNDER SECTION 10.2.3 IN CERTAIN CIRCUMSTANCES

     The provisions of Section 10.2.3 shall be subject to the following
     provisions:

     (a)  If one of the Parties has sub-contracted its rights and obligations
          under one of the Transaction Documents to another Party (the "Assuming
          Party") and the Transaction Documents Default shall be attributable to
          the Assuming Party, the Assuming Party shall be the Transaction
          Documents Defaulting Party under Section 10.2.3 in place of the Party
          whose rights and obligations it has assumed.

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<PAGE>

     (b)  In the event that a particular Transaction Documents Default is
          attributable to more than one Transaction Documents Defaulting Party,
          but provided that less than all the Parties are Transaction Documents
          Defaulting Parties, those Parties which are the Transaction Documents
          Defaulting Parties shall bear the Transaction Document Default
          consequences under Section 10.2.3 in proportion to their respective
          degree of responsibility for such Transactions Documents Default.

     (c)  If a Transaction Documents Default is not attributable to any
          particular Party or Parties, all the Parties shall bear the
          Transaction Document Default consequences under Section 10.2.3 in
          proportion to their Interest in SETA at the time of such Transaction
          Documents Default.

XI.  EXCLUSIVITY

11.1 EXCLUSIVE RIGHTS

     The Parties hereby guarantee fully exclusive rights among themselves within
     the scope of the Project under this Agreement and undertake not to
     establish any arrangements with any third parties aiming at the same or
     similar object, neither directly nor through any Related Parties, acting
     for themselves or jointly, and not to develop any activity to the benefit
     of any other existing or potential competitors both in relation to this
     Project or in any similar or related projects, as well as in relation to
     SCT itself, which might jeopardize the activity and the objectives of the
     Parties in connection with the acquisition or the taking of control of
     airports in Mexico.

11.2 EXCLUSIVITY REGARDING THE MEXICO CITY AIRPORT(S) PROJECT

     The Parties agree that this Consortium has been formed not only to
     participate in the bidding for the GCN, but also to participate in the
     bidding for the Mexico City Airport(s) project ("MCA"), subject to the
     following principles:

     1)   The exclusivity provisions contained in Clause 11.1 of this Agreement
          shall apply mutatis mutandis to the bid for the MCA by the Parties.

     2)   This exclusivity obligation of the Parties shall not prevent any Party
          hereto from withdrawing from the Consortium for purposes of the MCA
          bid, in which case the withdrawing Party hereby agrees and covenants
          not to establish any arrangements with any third parties aiming at the
          same or similar object, neither directly nor through any Related
          Parties, acting for themselves or jointly, and not to develop any
          activity to the benefit of any other existing or potential
          competitors, as well as in relation to SCT itself, which might
          jeopardize the activity and the objectives of the Parties.

     3)   The inclusion of third parties as additional members to the Consortium
          for the purpose of the MCA bid will require the unanimous consent of
          the Parties.

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     4)   The exclusivity provisions contained herein shall be in force for a
          period of six years starting from May 16, 2000.

     5)   ADP shall be allowed to be substituted, with regards to the
          exclusivity provisions for MCA, by a majority owned subsidiary of ADP,
          provided that:

          (a)  such proposed subsidiary is capable of meeting the MCA bid
               requirements as set out by the competent Mexican authorities;

          (b)  the minority shareholder(s) in such subsidiary shall not in any
               manner or capacity seek to obtain business contracts, financial
               profit, rights or benefits other than its share of the economic
               benefits of its shareholding in such subsidiary;

          (c)  the minority shareholder(s) agree(s) and covenant(s) as a
               condition precedent not to establish any arrangements with any
               third parties aiming at the same or similar object, neither
               directly nor through any Related Parties, acting for themselves
               or jointly, and not to develop any activity to the benefit of any
               other existing or potential competitors, as well as in relation
               to SCT itself which might jeopardize the activity and the
               objectives of VASA and AEROINVEST; and

          (d)  ADP shall remain bound by the exclusivity provisions hereunder.

     6)   CICASA and COINSA acknowledge and agree that they shall be bound by
          this Clause 11.2 as if they were a Party to this Consortium Agreement.

11.3 PARTICIPATION IN OTHER MEXICAN AIRPORT GROUPS

     Subject to Clause 11.2 hereof and the applicable restrictions under Mexican
     law and any other restriction under the Transaction Documents, it is the
     intention of the Parties to jointly participate, directly or indirectly,
     through Related Parties, in the capital stock of any other Mexican airport
     concessionaire or holding company, other than GCN and MCA, subject to terms
     and conditions to be mutually agreed upon, provided that:

     (a)  if any Party or its Related Parties proposes to enter into a new
          business, it shall first offer the other Parties and their Related
          Parties the opportunity jointly to pursue such new business; and

     (b)  the other Parties shall have thirty (30) days after receipt of the
          notice of such offer to determine whether or not they will pursue such
          new business, and if the other Parties determine not to enter into
          such new business, the proposing Party may pursue it on its own.

     For the purpose of this entire Clause 11, CICASA and COINSA shall each be
     deemed a Related Party of AEROINVEST.

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XII. CONFIDENTIALITY

     The Parties shall treat as confidential any information or documents
     exchanged among themselves as required for the development of the purpose
     of this Agreement (the "Confidential Information"), including, but not
     limited to, information or documents relating to sales, trade secrets,
     customers, financial and accounting details, employees, and arrangements
     with suppliers. Any information related to assets protected by intellectual
     or industrial property rights or equivalent rights shall be treated with
     strict respect for such rights.

     No Party may, without prior unanimous agreement in writing by the other
     Parties, (i) use Confidential Information for any other purpose than for
     the Project or this Agreement or (ii) disclose Confidential Information,
     unless the Confidential Information is:

     (a)  in the public domain at the time of the disclosure,

     (b)  required by law to be disclosed, or

     (c)  required to be used or disclosed for the performance of an obligation
          under this Agreement or an Obligation.

     Each Party shall procure that its Related Parties, and suppliers, comply
     with the exclusivity obligations contained in Clause 11 and the
     confidentiality obligations of this Clause.

     The confidentiality obligations under this Agreement will elapse five years
     after the date of its signature or before if all Parties so agree in
     writing.

XIII. MISCELLANEOUS

13.1 LANGUAGE

     In the construction and interpretation of the terms and provisions of this
     Agreement, the English language version of this Agreement shall be the
     official version of this Agreement and any version of this Agreement that
     has been translated into another language shall (if the Parties have all
     agreed on such transactions) have no force or effect except for purposes of
     enforcing this Agreement in a court of law that requires that the Agreement
     be presented in another language. The working language of the Parties will
     be English.

13.2 APPLICABLE LAW

     This Agreement is governed by and construed in accordance with the laws of
     the United Mexican States.

                                       39

<PAGE>

13.3 DURATION AND TERMINATION

     This Agreement shall remain in full force and effect until termination
     adopted by unanimous written agreement of the Parties.

     Termination of this Agreement in no event shall signify the cancellation of
     any pending obligations between the Parties derived from or in connection
     therewith.

     The provisions of Clause 11.2 and Section 12 shall survive the termination
     of this Agreement.

13.4 DISPUTES

13.4.1 AMICABLE SETTLEMENT OF DISPUTES

     If a dispute shall arise, under or in connection with this Agreement, the
     Parties shall use their best endeavors to resolve such dispute within ten
     (10) Business Days following the notice thereof of any Party to the others.
     If within the said ten (10) Business Days the Parties are unable to resolve
     said dispute, the Parties shall notify the said dispute to the
     Representatives. The Representatives shall meet to resolve the said dispute
     within the following five (5) Business Days as from the date of notice to
     them if the Representatives are unable to resolve the said dispute within
     the said five (5) Business Days, any Party may refer the dispute to
     arbitration in accordance with Clause 13.4.2.

13.4.2 ARBITRATION

     (a)  Arbitration. All disputes arising out of or in connection with the
          present Agreement shall be finally settled under the Rules of
          Arbitration of the International Chamber of Commerce (the "ICC Rules")
          by three arbitrators appointed in accordance with the ICC Rules.

     (b)  Appointment of Arbitrators. The arbitrators shall be nominated and
          confirmed in accordance with the ICC Rules. The two arbitrators
          nominated by the claimant and the respondent, respectively, shall,
          within thirty (30) days of their confirmation, nominate the third
          arbitrator, who shall serve as a chairman of the arbitral tribunal.
          All of the arbitrators must be able to read, write and fluently speak
          both Spanish and English.

     (c)  Arbitral Procedure. The place of the arbitration shall be the City of
          New York, State of New York, United States of America. The language of
          arbitration shall be English.

13.5 NOTICES

     All notices, demands, waivers, requests and other communications required
     or permitted to be given hereunder shall be in writing and shall be deemed
     to have been duly given when delivered in person, or when sent by telex or
     telecopy or other facsimile transmission (with receipt confirmed), or on
     the seventh Business Day after posting

                                       40

<PAGE>

     thereof by registered or certified mail, with return receipt requested,
     prepaid and addressed to the "list of contacts", attached hereto as Exhibit
     C.

     Each Party shall promptly notify the other Parties within eight (8)
     calendar days of any change of address.

13.6 AMENDMENTS

     This Agreement shall not be modified or amended except with the unanimous
     agreement in writing of the Parties.

13.7 FURTHER ASSURANCES

     The Parties hereto agree that they shall cooperate with each other and will
     execute and deliver, or cause to be delivered, all such other instruments,
     and shall take all such other actions as a Party hereto may reasonably
     request from time to time in order to give effect to the provisions and
     purposes hereof.

13.8 ATTORNEYS' FEES

     If any proceeding is brought by a Party or Parties against another Party or
     Parties to enforce, or for breach of, any of the provisions in this
     Agreement, the prevailing Party or Parties shall be entitled in such
     proceeding to recover reasonable attorneys' fees together with the costs of
     such proceeding therein incurred as determined by the arbitrators.

13.9 DOLLARS

     All sums expressed herein or to be paid hereunder shall be calculated or
     paid, as applicable, in United States Dollars. If for purposes of this
     Agreement or for the purpose of obtaining judgment in any court or award by
     an arbitral body it is necessary to convert any currency into Dollars, then
     the Parties agree, to the fullest extent that they may legally and
     effectively do so, that the rate of exchange used for such conversion shall
     be that published or announced by Citibank, N.A. in New York, New York,
     United States, at 12:00 hours ET, on the Business Day immediately preceding
     the day on which such calculation is to be made or such judgment or award
     is final. The obligations of the Parties in respect of any sums due from
     them hereunder shall, notwithstanding any judgment/award in a currency
     other than United States Dollars, be discharged only to the extent that, on
     the Business Day next succeeding receipt by the obligee(s) of any sum
     adjudged to be so due in the judgment/award currency, the obligee(s) may,
     in accordance with normal banking procedures, purchase United States
     Dollars with the judgment/award currency. If the United States Dollars so
     purchased (less exchange fees and related charges) are less than the sum
     originally due to the obligee(s) and notwithstanding any such
     judgment/award, are insufficient to indemnify the obligee(s) against such
     loss, then, the obligor(s) shall remit such shortfall to the obligee(s) and
     if the United States Dollars so purchased exceed the sum originally due to
     the obligee(s) in Dollars, the obligee(s) shall remit such excess to the
     obligor(s), as applicable.

                                       41

<PAGE>

13.10 BINDING EFFECT

     This Agreement shall be binding upon and inure to the benefit of a) the
     Parties hereto and their estates, legatees, heirs, personal representatives
     and other successors in interest, and b) SETA, its successors and assigns.

13.11 HEADINGS

     The headings in this Agreement are intended solely for convenience of
     reference and shall be given no effect in the construction or
     interpretation of this Agreement.

13.12 COUNTERPARTS

     This Agreement may be executed in three or more counterparts, each of which
     shall be deemed an original, but all of which shall constitute the one and
     the same Agreement.

13.13 ENTIRE AGREEMENT

     All references to Exhibits are to Exhibits in or to this Agreement unless
     specified otherwise. This Agreement and the Exhibits are intended to amend
     and supersede the 2000 Consortium Agreement. For the avoidance of doubt,
     the Parties acknowledge and agree that this Agreement is intended only to
     incorporate amendments to the 2000 Consortium Agreement and does not nor
     shall not be deemed to constitute a novation (novacion) of the 2000
     Consortium Agreement or a termination of the 2000 Consortium Agreement. All
     other documents related to the Project shall also remain in full force and
     effect, including, but not limited to, the Direct Agreement dated
     September, 26 2003 among ADP, VASA, AEROINVEST, COINSA, COMPANIA
     EMPRESARIAL ANDREA-J, S.A. DE C.V. (CEA-J), AND MESSRS. BERN ARDO QUINTANA
     ISAAC, ALEXANDRA KAWAGE DE QUINTANA, DIEGO QUINTANA KAWAGE, ANA ALEXANDRA
     QUINTANA KAWAGE, ANDREA QUINTANA KAWAGE, RODRIGO QUINTANA KAWAGE, JERONIMO
     QUINTANA KAWAGE AND ALONSO QUINTANA KAWAGE.

13.14 PARTIAL INVALIDITY AND INTENTION OF PARTIES

13.14.1 If any provision of this Agreement, or the application of a provision to
     any person or circumstance, shall be held by any competent authority to be
     invalid or unenforceable in any jurisdiction, the validity or legality of
     the remainder of this Agreement, or the application of such provision to
     persons or circumstances other than those to which it is held invalid,
     shall not be affected. To the extent permitted by applicable law, the
     Parties hereby waive any provision of law which renders any provision
     hereof prohibited or unenforceable in any respect.

13.14.2 If any third party contests the validity or this Agreement under Mexican
     law, the Parties shall use their best efforts to achieve the intention of
     this Agreement in the best interests of the Project.

                                       42

<PAGE>

13.14.3 If any of the provisions of this Agreement does not conform with Mexican
     law, the Parties shall seek on a best-efforts basis to ensure that their
     intention is put into effect.

13.15 PERSON AND GENDER

     The masculine gender shall include the feminine and neuter genders and the
     singular shall include the plural.

13.16 ACKNOWLEDGMENT

     Each of the Parties acknowledges that this Agreement has been duly executed
     and delivered by the Parties and as from its date of execution will
     constitute the valid, legal and binding obligations and is enforceable
     against each of the Parties, in accordance with its terms.

13.17 PRECEDENCE OF PROVISIONS

     In the case of a conflict between any provision of this Agreement (a
     "Consortium Provision") and any provision of the Operation Agreement, the
     Consortium Provision shall prevail.

                                       43

<PAGE>

     IN WITNESS WHEREOF, each of the Parties hereto has caused a counterpart of
this Agreement to be duly executed as of _____ July, 2004.

                                        AEOPORTS DE PARIS

                                                       [illegible]
                                        ----------------------------------------
                                        By:            [illegible]
                                            ------------------------------------
                                        Title:         [illegible]
                                               ---------------------------------

                                        AEROINVEST, DE C.V.

                                                       [illegible]
                                        ----------------------------------------
                                        By:            [illegible]
                                            ------------------------------------
                                        Title: Vice President

                                        VINCI AIRPORTS S.A.

                                                       [illegible]
                                        ----------------------------------------
                                        By: Renaud de Methard
                                        Title: Director

ACCEPTED AND AGREED AS OF ___

VINCI S.A.

             [illegible]
-------------------------------------
By:          [illegible]
    ---------------------------------
Title:       [illegible]
       ------------------------------

CONSTRUCTORAS ICA, S.A. DE C.V.

             [illegible]
-------------------------------------
By: Luis Zarate Rocha
Title: Vice President

                                       44

<PAGE>

CONTROLADORA DE OPERACIONES DE
INFRAESTRUCTURA, S.A. DE C.V.

             [illegible]
-------------------------------------
By:          [illegible]
    ---------------------------------
Title: Vice President

                                       45

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