**RECITALS:**I. **The Controlling Company**states, represents and warrants that:Its legal representative evidences his/her authority with notarized public instrument number 52,847issued on May 10th, 1999 by Mr. Luis de Angoitia Becerra, Notary Public number 109 ofthe Federal District, which was recorded in the Public Registry of Commerce of Mexico City, FederalDistrict under commercial folio number 237658, entry 19603, on July 8th, 1999, and thatsuch authority has not been revoked, modified or limited in any way to date.II. **The Service Company**states, represents and warrants that:Its legal representative evidences his/her authority with notarized public instrument number 52,609issued on June 2nd,1999, by Mr. Luis de Angoitia Becerra, Notary Public number 109 ofthe Federal District, which was recorded in the Public Registry of Commerce of Mexico City, FederalDistrict under commercial folio number 237657, entry 12959, on July lst, 1999, and thatsuch authority has not been revoked, modified or limited in any way to date.III. **The Concessionaire Companies**state, represent and warrant:**AEROPUERTO DE CANCÚN, S.A. DE C.V.-** It has the necessary representational authority toenter into this Amendment and be bound by its terms and conditions, as evidenced by notarizedpublic instrument number 52,812 dated August 13th, 1999, issued by Mr. Luis de AngoitiaBecerra, Notary Public number 109 of the Federal District, which was recorded in the PublicRegistry of Commerce of Cancún, Quintana Roo, under number 83, pages 941 — 981, Volume CCVIII,Section IV, on October 13th, 1999, and that such authority has not been revoked,modified or limited in any way to date.**AEROPUERTO DE COZUMEL, S.A. DE C.V.-** It has the necessary representational authority toenter into this Amendment and be bound by its terms and conditions, as evidenced by notarizedpublic instrument number 52,813 dated August 13th, 1999, issued by Mr. Luis de AngoitiaBecerra, Notary Public number 109 of the Federal District, which was recorded in the PublicRegistry of Commerce of Cozumel, Quintana Roo, under number 21, pages 356 — 397, Volume XXXVIII,Section IV, on September 14th,1999, Electronic Folio number 2154, and that suchauthority has not been revoked, modified or limited in any way to date.**AEROPUERTO DE HUATULCO, S.A. DE C.V.-** It has the necessary representational authority toenter into this Amendment and be bound by its terms and conditions, as evidenced by notarizedpublic instrument number 52,816 dated August 13th, 1999, issued by Mr. Luis de AngoitiaBecerra, Notary Public number 109 of the Federal District, which was recorded in the PublicRegistry of Commerce of Santa Cruz, Huatulco, Pochutla, Oaxaca, under number 54, Commerce SectionBook, Volume I, on September 23rd, 1999, and that such authority has not been revoked,modified or limited in any way to date.**AEROPUERTO DE MÉRIDA, S.A. DE C.V.-** It has the necessary representational authority toenter into this Amendment and be bound by its terms and conditions, as evidenced by notarizedpublic instrument number 52,817 dated August 13th, 1999, issued by Mr. Luis de AngoitiaBecerra, Notary Public number 109 of the Federal District, which was recorded in the PublicRegistry of Commerce of Mérida, Yucatán, under number 32,212, Entry 3rd, Folio 28,Volume 52, Volume “B”, Book 1, on September 3rd, 1999, Electronic Commercial Folionumber 8695 1, and that such authority has not been revoked, modified or limited in any way todate.
 
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**AEROPUERTO DE MINATITLÁN, S.A. DE C.V.-** It has the necessary representational authority toenter into this Amendment and be bound by its terms and conditions, as evidenced by notarizedpublic instrument number 52,818, dated August 13th, 1999, issued by Mr. Luis de AngoitiaBecerra, Notary Public number 109, of the Federal District, which was recorded in the PublicRegistry of Commerce of Minatitlán, Veracruz, under number 182, Pages 1283 — 1323, Volume III,Commerce Section, on September 8th, 1999, and that such authority has not been revoked,modified or limited in any way to date.**AEROPUERTO DE OAXACA, S.A. DE C.V.-** It has the necessary representational authority toenter into this Amendment and be bound by its terms and conditions, as evidenced by notarizedpublic instrument number 93,330 dated June 8th, 2007, issued by Mr. Omar Abacuc SanchezHeras, Notary Public number 38 of Oaxaca, which was recorded in the Public Registry of Commerce ofOaxaca, with Electronic Commercial Folio number 1269 ID l, on June 20th, 2007, and thatsuch authority has not been revoked, modified or limited in any way to date.**AEROPUERTO DE TAPACHULA, S.A. DE C.V.-** It has the necessary representational authority toenter into this Amendment and be bound by its terms and conditions, as evidenced by notarizedpublic instrument number 52,820 dated August 13th, 1999, issued by Mr. Luis de AngoitiaBecerra, Notary Public number 109 of the Federal District, which was recorded in the PublicRegistry of Commerce of Tapachula, Chiapas, under number 322, Book I, Section V, Volume 1023, onOctober 8th, 1999, and that such authority has not been revoked, modified or limited inany way to date.**AEROPUERTO DE VERACRUZ, S.A. DE C.V.-** It has the necessary representational authority toenter into this Amendment and be bound by its terms and conditions, as evidenced by notarizedpublic instrument number 52,821 dated August 13th, 1999, issued by Mr. Luis de AngoitiaBecerra, Notary Public number 109 of the Federal District, which was recorded in the PublicRegistry of Veracruz, Veracruz, under number 1360, pages 1 to 21, Section L-I Com., Volume 20, onSeptember 22nd, 1999, and that such authority has not been revoked, modified or limitedin any way to date.**AEROPUERTO DE VILLAHERMOSA, S.A. DE C.V.-** It has the necessary representational authorityto enter into this Amendment and be bound by its terms and conditions, as evidenced by notarizedpublic instrument number 52,822 dated August 13th, 1999, issued by Mr. Luis de AngoitiaBecerra, Notary Public number 109 of the Federal District, which was recorded in the PublicRegistry of Villahermosa, Tabasco under number 830, General Book of Entries, Folios 5932 to 5953,Book of duplicates, Volume 104, being annotated under folio 52 of the First Book of Commerce,Volume VI, on September 13th, 1999, and that such authority has not been revoked,modified or limited in any way to date.
 
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IV. **The Strategic Partner**states, represents and warrants that:Its legal representative evidences his/her authority with notarized public instrument number 15,691dated June 25th, 2002, issued by Mr. Arturo Pérez Negrete, Notary Public number 119 ofthe Federal District, which was recorded in the Public Registry of Commerce of Mexico City, FederalDistrict under commercial folio number 242982 on July 2nd, 2002, and that such authorityhas not been revoked, modified or limited in any way to date.V. Common statements, representations and warranties of the parties hereto:1. They wish to enter into this Amendment for the purpose of amending the **Technical Assistanceand Transfer of Technology Agreement**referred under the first recital hereof. 2. Through their respective representatives, the parties mutually acknowledge the capacity withwhich they execute this instrument and the authority to state their will and consequently, tobe bound by the terms hereof. 3. They wish to amend section 6 entitled Economic Terms, specifically section 6.3.2 of the**Technical Assistance and Transfer of Technology Agreement**, in accordance with the clauses ofthis Amendment.By virtue of the foregoing recitals, the parties agree to be bound by the terms of the following:
 
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**CLAUSES****ONE**. The Controlling Company, the Service Company, the Concessionaire Companies, the StrategicPartner, and the Partners of the Strategic Partner, hereby agree to amend, as of **January1****st****, 2008**, section 6 of the **Technical Assistance and Transfer of Technology Agreement**entitled Economic Terms, specifically section **6.3.2**, as follows:***6. Economic Terms:****The Service Company agrees to pay to the Strategic Partner, for the performance of its obligationscontained under**Section 2**above:****6.3 Form of Payment.******6.3.1 .....................******6.12 With respect to the consideration referred under******section 6.2*****,*****theService Company will pay the amount set forth under******Section 6.2******on aquarterly basis and in accordance with the calculation for the terms (January toMarch, April to June, July to September, October to December), after the Board ofDirectors of the Controlling Company approves the results of the term, and within 10(ten) calendar days after receiving the relevant invoice issued by the StrategicPartner.******After holding the annual general ordinary shareholders’ meeting of the ControllingCompany that approves the consolidated financial statements of the Airport Group forthe annual period, showing the results of the fiscal year of the Airport Group on aconsolidated basis, the parties hereto will determine whether the consideration thatcorresponds to the Strategic Partner is the consideration referred under******Section6.2******. If the amount that results from applying 5% (five percent) over the amountthat results from decreasing the net income, the sum of costs and the servicesprovided and the operation expenses corresponding to the airport group on aconsolidated basis, is greater than the sum of the amounts paid on a quarterly basisindicated under******Section 6.3.2******, the Service Company will pay to the strategicpartner, within 15 business days after the date of the Annual General OrdinaryShareholders’ Meeting of the Controlling Company, at the latest, the correspondingdifference to cover the consideration provided under******Section 6.2******.;otherwise, the additional payment will be adjusted in the next term following thedate of the Meeting.*****TWO**. The parties state that their only intent is to amend the Agreement in the terms providedunder Clause One of this instrument. Therefore, the rest of the terms and conditions not amendedby this Amendment will remain in effect in the same manner for all legal purposes, being herebyincorporated by reference, for which it does not imply and novation of any kind.**THREE**. The parties agree that this instrument must be considered part of the ParticipationAgreement and the Shareholders’ Agreement.
 
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Having read this Amendment, the parties hereto sign 4 counterparts hereof on each page and at thebottom of this last page, on **January 1****st****, 2008**, in Mexico City, Federal District,stating that there existed no fraud, violence, injury or any other kind of mistake or lack ofagreement that could invalidate it, for which it shall become part of the **Technical Assistance andTransfer of Technology Agreement**, for any and all legal purposes.   **Grupo Aeroportuario del Sureste,** **Inversiones y Técnicas Aeroportuarias,****S.A.B. de C.V.** **S.A. de C.V.**   **/s/ Claudio R. Góngora Morales** **/s/ Alistair McCradie**   **Claudio R. Góngora Morales** **Alistair McCradie** **Servicios Aeroportuario del Sureste,** **Acting personally:****S.A. de C.V.**     **/s/ Claudio R. Góngora Morales** **/s/ Fernando Gerardo Chico Pardo**   **Claudio R. Góngora Morales** **Fernando Gerardo Chico Pardo** **Aeropuerto de Cancún, S.A. de C.V.** **Copenhagen Airports A/S**  **(Kobenhavns Lufthavne A/S)**   **/s/ Claudio R. Góngora Morales** **/s/ Rasmus Christiansen**   **Claudio R. Góngora Morales** **Rasmus Christiansen** **Aeropuerto de Cozumel, S.A. de C.V.** **Aeropuerto de Huatulco, S.A. de C.V.**   **/s/ Claudio R. Góngora Morales** **/s/ Claudio R. Góngora Morales**   **Claudio R. Góngora Morales** **Claudio R. Góngora Morales** **Aeropuerto de Mérida, S.A. de C.V.** **Aeropuerto de Minatitlán, S.A. de C.V.**   **/s/ Claudio R. Góngora Morales** **/s/ Claudio R. Góngora Morales**   **Claudio R. Góngora Morales** **Claudio R. Góngora Morales** **Aeropuerto de Oaxaca, S.A. de C.V.** **Aeropuerto de Tapachula, S.A. de C.V.**   **/s/ Claudio R. Góngora Morales** **/s/ Claudio R. Góngora Morales**   **Claudio R. Góngora Morales** **Claudio R. Góngora Morales** **Aeropuerto de Veracruz, S.A. de C.V.** **Aeropuerto de Villahermosa, S.A. de C.V.**   **/s/ Claudio R. Góngora Morales** **/s/ Claudio R. Góngora Morales**   **Claudio R. Góngora Morales** **Claudio R. Góngora Morales****THIS SIGNATURE PAGE CORRESPONDS TO THE AMENDMENT TO THE TECHNICAL ASSISTANCE AND TRANSFER OFTECHNOLOGY AGREEMENT ENTERED INTO BY AND BETWEEN GRUPO AEROPORTUARIO DEL SURESTE, S.A.B. DE C.V.(HEREINAFTER, THE “CONTROLLING COMPANY”), SERVICIOS AEROPORTUARIOS DEL SURESTE, S.A. DE C.V.(HEREINAFTER, THE “SERVICE COMPANY”), AEROPUERTO DE CANCÚN, S.A. DE C.V., AEROPUERTO DE COZUMEL,S.A. DE C.V., AEROPUERTO DE HUATULCO, S.A. DE C.V., AEROPUERTO DE MÉRIDA, S.A. DE C.V., AEROPUERTODE MINATITLÁN, S.A. DE C.V., AEROPUERTO DE OAXACA, S.A. DE C.V., AEROPUERTO DE TAPACHULA, S.A. DEC.V., AEROPUERTO DE VERACRUZ, S.A. DE C.V., AEROPUERTO DE VILLAHERMOSA, S.A. DE C.V. (JOINTLY, THE“CONCESSIONAIRE COMPANIES”) AS ONE PARTY AND BY INVERSIONES TÉCNICAS AEROPORTUARIAS, S.A. DE C.V.(HEREINAFTER “THE STRATEGIC PARTNER”); MR. FERNANDO GERARDO CHICO PARDO, COPENHAGEN AIRPORTS A/S(KOBENHAVNS LUFTHAVNE A/S) (“THE PARTNERS OF THE STRATEGIC PARTNER”) AS ANOTHER PARTY, EXECUTED ONJANUARY 1****ST****, 2008.**
 
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