Document:

Second Amendment Agreement to that certain Stock Pledge Agreement

 EXHIBIT 10.4 
 EXECUTION VERSION 
 SECOND AMENDMENT AGREEMENT to that certain Stock Pledge
Agreement, dated January 10, 2013 (this “Amendment Agreement”) entered into by and among MTC Puerta México, S. de R.L. de C.V. (“MTC”) and Highstar Harbor Holdings México, S. de R.L. de C.V
(“HHH” and together with MTC, the “Pledgors” and each a “Pledgor”), Vamos a México, S.A. de C.V. (the “Company”), JPMorgan Chase Bank, N.A., as Collateral Agent, acting on
its own behalf and on behalf and for the benefit of the Secured Parties as pledgee (hereinafter, together with its successors or assigns, the “Pledgee”, and together with the Pledgors and the Company, the “Parties”)
(capitalized terms used and not defined herein shall have the meanings ascribed to them in the Original Stock Pledge Agreement (as defined below)). 
 RECITALS 
 WHEREAS, on August 30, 2010, Kansas City
Southern de México, S.A. de C.V. (“KCSM”), as borrower, entered into a Credit Agreement for the maximum principal amount of US$100,000,000.00 (one hundred million dollars 00/100, currency of the United States of America) (the
“Original Credit Agreement”), with various financial institutions and other persons from time to time parties thereto or that subsequently became parties thereto (including their successors and assigns) as lenders, The Bank of Nova
Scotia, as administrative agent, Scotiabank Inverlat, S.A., Institución de Banca Múltiple, Grupo Financiero Scotiabank Inverlat, as Collateral Agent, and The Bank of Nova Scotia and Banc of America Securities LLC, as joint lead
arrangers and joint bookrunners. 
 WHEREAS, on August 30, 2010, Scotiabank Inverlat, S.A., Institución de
Banca Múltiple, Grupo Financiero Scotiabank Inverlat, the Company and the Pledgors entered into a Stock Pledge Agreement (Contrato de Prenda sobre Acciones) (the “Original Stock Pledge Agreement”), under which the
Pledgors granted a first priority lien in favor of Scotiabank Inverlat, S.A., Institución de Banca Múltiple, Grupo Financiero Scotiabank Inverlat, acting as pledgee, in respect of the Collateral, to secure the due and punctual
performance of the Obligations. A copy of the Original Stock Pledge Agreement (without exhibits) is attached hereto as Exhibit “A”. 
 WHEREAS, on September 30, 2011, KCSM, as borrower, entered into an Amended and Restated Credit Agreement to amend and restate the Original Credit Agreement in its entirety, including but not
limited to, increase the maximum principal amount to US$200,000,000.00 (two hundred million dollars 00/100, currency of the United States of America) (the “First Amended and Restated Credit Agreement”), with various financial
institutions and other persons from time to time parties thereto (including their successors and assigns) as lenders, JPMorgan Chase Bank, N.A., as administrative agent and as collateral agent, JPMorgan Securities, LLC and Merrill Lynch, Pierce,
Fenner & Smith, Incorporated, as joint lead arrangers and joint bookrunners, JPMorgan Securities LLC as Syndication Agent, BBVA Bancomer, S.A., Institución de Banca Múltiple, Grupo Financiero BBVA Bancomer as joint bookrunner
and co-documentation agent and Bank of America N.A. as co-documentation agent. 

 WHEREAS, on September 30, 2011, Scotiabank Inverlat, S.A., Institución de
Banca Múltiple, Grupo Financiero Scotiabank Inverlat, acting as substituted pledgee, the Pledgee, acting as substitute pledgee, the Pledgors, as pledgors and the Company, entered into an Assignment and Amendment Agreement (Contrato
Modificatorio y de Cesión) to the Original Stock Pledge Agreement (the “Assignment and Amendment Agreement” and the Original Stock Pledge Agreement as amended by the Assignment and Amendment Agreement, the “Stock
Pledge Agreement”), under which Scotiabank Inverlat, S.A., Institución de Banca Múltiple, Grupo Financiero Scotiabank Inverlat assigned and transferred all its rights and obligations under the Original Stock Pledge Agreement
to the Pledgee, and the Pledgee accepted such assignment and transfer. A copy of the Assignment and Amendment Agreement (without exhibits) is attached hereto as Exhibit “B”. 

WHEREAS, on November 29, 2012, KCSM, as borrower, various financial institutions and other persons from time to time parties
thereto or that subsequently became parties thereto (including their successors and assigns) as lenders, JPMorgan Chase Bank, N.A., as administrative agent and collateral agent, JPMorgan Securities, LLC and Merrill Lynch, Pierce, Fenner &
Smith, Incorporated, as joint lead arrangers and joint bookrunners, JPMorgan Securities LLC, as syndication agent and BBVA Bancomer, S.A., Institución de Banca Múltiple, Grupo Financiero BBVA Bancomer and Bank of America, N.A., as
co-documentation agents, entered into a Second Amended and Restated Credit Agreement to amend and restate the First Amended and Restated Credit Agreement in its entirety (the “Second Amended and Restated Credit Agreement”, and
Original Credit Agreement as amended and restated by the First Amended and Restated Credit Agreement and the Second Amended and Restated Credit Agreement, the “Credit Agreement”). A copy of the Second Amended and Restated Credit
Agreement (without exhibits) is attached hereto as Exhibit “C”. 
 WHEREAS, the Parties hereto
are entering into this Amendment Agreement to modify several clauses of the Stock Pledge Agreement in order to reflect certain terms of the Second Amended and Restated Credit Agreement. 

REPRESENTATIONS 
  

	 	I.	Each of the Pledgors hereby represents and warrants that: 

 (a) MTC and HHH are limited liability companies with variable capital (sociedades de responsabilidad limitada de capital variable), duly organized and validly existing under the laws of the United
Mexican States (“Mexico”) and are in compliance with their corporate and any other obligations under the laws of the jurisdiction of their organization. 
 (b) It has the corporate power and authority to enter into this Amendment Agreement and has obtained all required corporate authorizations and approvals to perform its obligations in the terms provided
hereunder. 

  
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 (c) Its attorney-in-fact is duly authorized to enter into this Amendment Agreement, which
authority has not been revoked or modified in any manner whatsoever. 
 (d) The execution and performance of this Amendment
Agreement, and the granting of the pledge under the Stock Pledge Agreement do not violate its by-laws or any other documents or any law, regulation, judgment or order applicable to it or any contract, agreement, deed or other instrument to which it
is a party or to which its rights and properties are subject or result in the creation or imposition of any lien, claim or rights of third parties upon or with respect to any such properties, other than the pledge under the Stock Pledge Agreement.

 (e) It is the legal and beneficial owner, free of any lien, encumbrances or ownership limitations (except for the pledge and
security interest created under the Stock Pledge Agreement) of the Collateral. 
 (f) It is willing to enter into this Amendment
Agreement in order to amend several clauses of the Stock Pledge Agreement in order to reflect certain terms of the Second Amended and Restated Credit Agreement. 
 (g) Other than as described herein, the execution of this Amendment Agreement does not affect the first priority security interest in the Collateral granted under the Stock Pledge Agreement to secure the
due and prompt satisfaction of any and all of the Obligations and all the necessary actions to perfect and protect such security interest have been taken. 
 (h) Except as expressly stated herein, no consent of any other person and no authorization, permit, approval or other action by, and no notice to or filing with, any governmental authority or regulatory
body is required (i) for the Pledgors to execute this Amendment Agreement and to maintain the pledge by the Pledgors of the Collateral pursuant to the Stock Pledge Agreement or for the execution or performance of this Amendment Agreement by the
Pledgors, (ii) for the perfection or maintenance of the pledge on the Collateral created under the Stock Pledge Agreement (including the first priority nature of such pledge) or (iii) to exercise the remedies in respect of the Collateral
pursuant to the Stock Pledge Agreement. 
 (i) By executing this Amendment Agreement, it expressly recognizes the existence of
the Secured Parties and the legal capacity of the Pledgee to act as Collateral Agent on behalf and for the benefit of Secured Parties in the execution of this Amendment Agreement and under the Stock Pledge Agreement, and the legal capacity and
authority of its respective representatives to execute this Amendment Agreement. 
  

	 	II.	The Pledgee hereby represents and warrants that: 

 (a) It is a national association legally organized and validly existing under the laws of the United States of America, acting on behalf and for the benefit of the Secured Parties, as Collateral Agent
pursuant to the terms of the Credit Agreement. 

  
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 (b) Its representative is duly authorized to enter into this Amendment Agreement, which
authority has not been revoked or modified in any manner whatsoever. 
  

	 	III.	The Company hereby represents and warrants that: 

 (a) It is a corporation with variable capital (sociedad anónima de capital variable), duly organized and validly existing under the laws of Mexico and is in compliance with its corporate and
any other obligations under the laws of the jurisdiction of its organization. 
 (b) It has the corporate power and authority to
enter into this Amendment Agreement and has obtained all required corporate authorizations and approvals to perform its obligations in the terms provided hereunder. 
 (c) Its attorney-in-fact is duly authorized to enter into this Amendment Agreement, which authority has not been revoked or modified in any manner whatsoever. 

(d) The execution and performance of this Amendment Agreement, and the granting of the pledge under the Stock Pledge Agreement do not
violate its by-laws or any other documents or any law, regulation, judgment or order applicable to it or any contract, agreement, deed or other instrument to which it is a party or to which its rights and properties are subject or result in the
creation or imposition of any lien, claim or rights of third parties upon or with respect to any such properties. 
 (e) It is
willing to enter into this Amendment Agreement in order to amend several clauses of the Stock Pledge Agreement in order to reflect certain terms of the Second Amended and Restated Credit Agreement. 

(f) Other than as described herein, the execution of this Amendment Agreement does not affect the first priority security interest in the
Collateral granted under the Stock Pledge Agreement to secure the due and prompt satisfaction of any and all of the Obligations and all the necessary actions to perfect and protect such security interest have been taken. 

(g) Except as expressly provided herein, no consent of any other person and no authorization, permit, approval or other action by, and no
notice to or filing with, any governmental authority or regulatory body is required (i) for the Pledgors to execute this Amendment Agreement and to maintain the pledge by the Pledgors of the Collateral pursuant to the Stock Pledge Agreement or
for the execution or performance of this Amendment Agreement by the Pledgors, (ii) for the perfection or maintenance of the pledge on the Collateral created under the Stock Pledge Agreement (including the first priority nature of such pledge)
or (iii) to exercise the remedies in respect of the Collateral pursuant to the Stock Pledge Agreement. 
 (h) By executing
this Amendment Agreement, it expressly recognizes the existence of the Secured Parties and the legal capacity of the Pledgee to act as Collateral Agent on behalf and for the benefit of Secured Parties in the execution of this Amendment Agreement and
under the Stock Pledge Agreement, and the legal capacity and authority of its respective representatives to execute this Amendment Agreement. 

  
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 NOW, THEREFORE the Parties have agreed to the following: 

CLAUSES 
 FIRST. Amendments to the Stock Pledge Agreement. 
 Effective
as of the date hereof, the Parties hereby agree to amend certain clauses of the Stock Pledge Agreement, as described below: 

(a) Clause Fifth is hereby amended to read as follows: 
 “Clause Fifth. Term. 
 The pledge created hereunder
shall remain in full force and effect until the Termination Date (as defined in the Credit Agreement) has occurred. The number of the Pledged Shares subject to this Agreement shall not be reduced, notwithstanding the partial payment of the
Obligations. 
 Notwithstanding the foregoing, the pledge created hereunder shall be terminated, released and
discharged, prior to the Termination Date (as defined in the Credit Agreement), pursuant to Section 9.12 of the Credit Agreement.” 
 (b) The first paragraph of Clause Sixth is hereby amended to read as follows: 

Clause Sixth. Covenants of each Pledgor. 
 During the effectiveness of this Agreement, each Pledgor shall: 
  

... 
 (c) Clause Twelfth is hereby amended to read as follows: 
 Clause Twelfth.
Release of Pledge. 
 (i) Promptly after the occurrence of the Termination Date, or (ii) as soon as
reasonably practicable after the receipt by the Pledgee of a written notice from the Borrower stating that an Investment Grade Period (as defined in the Credit Agreement) has commenced and provided that no Event of Default (as defined in the Credit
Agreement) shall have occurred and be continuing, the Pledgee agrees to execute any documents that are necessary in order to release the pledge created hereunder, at the cost and expense of the Pledgors. The Pledgee shall not be required to make any
representations or warranties in any such release documents. 

  
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 SECOND. Registration of this Amendment Agreement. 

(a) The Pledgors hereby agree to 
 (i) formalize this agreement before a Notary Public in Mexico on the date hereof; 

(ii) file this Amendment Agreement for registration with (i) the Public Registry of Property and Commerce of the Pledgors domicile
and (ii) the Registry of Guaranties on Movable Assets, within fifteen (15) calendar days following the date hereof (with such extensions as the Pledgee may grant in its sole discretion); and 

(iii) obtain and deliver to the Pledgee written confirmation, in terms satisfactory to the Pledgee, of the registration of this Amendment
Agreement with (i) the Registry of Guaranties on Movable Assets, within twenty (20) Business Days from the date of its filing before such registry (with such extensions as the Pledgee may grant in its discretion), and (ii) the Public
Registry of Property and Commerce, within one hundred and twenty (120) calendar days from the date of its filing before such registry (with such extensions as the Pledgee may grant in its sole discretion). 

THIRD. Ratification of the Terms of the Stock Pledge Agreement. 

The Parties agree and confirm that the only amendments to the Stock Pledge Agreement are those set forth in this Amendment Agreement. The
Pledgors and the Pledgee hereby confirm and ratify all of the terms and conditions of the Stock Pledge Agreement which are, and continue to be, in full force and effect. 
 FOURTH. No Novation. 
 The execution of this Amendment Agreement
shall not constitute (i) a novation (novación) of the obligations of the Pledgors and the Pledgee under the Stock Pledge Agreement or (ii) a novation (novación), modification or payment of the Obligations.

 FIFTH. Notices. 
 (a) All notices and other communications related to this Amendment Agreement, shall be in writing, in the English and Spanish languages, and shall be delivered or sent to the domiciles or facsimile
numbers set forth below, or in any other domicile or facsimile number designated by each party or its representatives by written notice to the other party. Such notices and communications shall be delivered or sent (i) by hand, (ii) by
courier, or (iii) by facsimile. The parties for such effects designate the following domiciles: 

  
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 The Pledgors and the Company: 
 Montes Urales No. 625 
 Col. Lomas de Chapultepec 

11000, México D.F. 
 Facsimile:
(5255) 9178 5600 ext. 22179 
 Telephone: (5255) 9178 5647 
 Attention: Legal Department (Departamento Jurídico) 
 The Pledgee:

 JPMorgan Chase Bank, N.A. 

Loan and Agency Services Group 
 1111
Fannin, Floor 10 
 Houston, Texas 77002 

Telephone: (713) 750 1882 / (713) 427 6530 
 Facsimile: (713) 750 2938 
 Attention: Colton Rainey/Jide Williams 

cc: JPMorgan Chase Bank, N.A. 
 383 Madison
Avenue 
 New York, New York 10179 

Facsimile: (212) 270-5100 
 Attention:
Matthew Massie 
 (b) Any Party may change its domicile to receive notices pursuant to this Amendment Agreement by giving
written notice not less than five (5) Business Days prior to the date on which such change shall become effective in accordance with the provisions of this Clause. 
 (c) Any notice, if mailed and properly addressed with postage prepaid or if properly addressed and sent by pre-paid courier service, shall be deemed given when received; any notice, if transmitted by
facsimile, shall be deemed given when the confirmation of transmission thereof is received by the transmitter; provided that, as long as it is authorized by applicable law, the impossibility of delivering notices due to changes in the
addresses that have not been notified to the other Party hereto, or the refusal of any party to accept any notice, shall be considered received on the date of such delivery to the prior address or refusal to accept a notice. 

SIXTH. Governing Law and Jurisdiction. 
 This Amendment Agreement shall be governed by and construed in accordance with the federal laws of Mexico. For the interpretation, construction, performance and enforcement of this Amendment Agreement,
the Parties irrevocably submit to the jurisdiction of the federal courts located in the Federal District, and waive any right to any jurisdiction to which they may be entitled by reason of their respective present or future domicile. 

[signature pages follow] 

  
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 IN WITNESS WHEREOF, the Parties execute this Amendment Agreement as of the date first
above written. 
  

	
	
	PLEDGOR
	
	MTC PUERTA MÉXICO, S. DE R.L. DE C.V.
	
	/s/ Edgar Aguileta Gutiérrez
	 BY: Edgar Aguileta Gutiérrez

TITLE: Attorney-in-Fact

	
	PLEDGOR
	
	HIGHSTAR HARBOR HOLDINGS MÉXICO, S. DE R.L. DE C.V
	
	/s/ Edgar Aguileta Gutiérrez
	 BY: Edgar Aguileta Gutiérrez

TITLE: Attorney-in-Fact

	
	COMPANY
	
	VAMOS A MÉXICO, S.A. DE C.V.
	
	/s/ Edgar Aguileta Gutiérrez
	 BY: Edgar Aguileta Gutiérrez

TITLE: Attorney-in-Fact

  
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	THE PLEDGEE
	
	 JPMORGAN CHASE BANK, N.A.,
 as Collateral Agent, acting on its own behalf and
 on behalf and for the benefit of
the Secured Parties

	
	/s/ Argel Becerra Adame
	 BY: Argel Becerra Adame
 TITLE: Attorney-in-Fact

  
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 Exhibit “A” 

Original Stock Pledge Agreement (without exhibits) 

  
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 Exhibit “B” 

Assignment and Amendment Agreement 

  
 11 

 Exhibit “C” 

Second Amended and Restated Credit Agreement (without exhibits) 

  
 12Second Amendment Agreement to that certain Partnership Interest Pledge Agreement

 EXHIBIT 10.5 
 EXECUTION VERSION 
 SECOND AMENDMENT AGREEMENT to that certain Partnership
Interest Pledge Agreement, dated January 10, 2013 (this “Amendment Agreement”) entered into by and among Highstar Harbor Holdings México, S. de R.L. de C.V. (“HHH”) and Nafta Rail, S.A. de C.V.
(“Nafta” and together with HHH, the “Pledgors” and each a “Pledgor”), MTC Puerta México, S. de R.L. de C.V. (the “Company”), JPMorgan Chase Bank, N.A., as Collateral Agent,
acting on its own behalf and on behalf and for the benefit of the Secured Parties as pledgee (hereinafter, together with its successors or assigns, the “Pledgee”, and together with the Pledgors and the Company, the
“Parties”) (capitalized terms used and not defined herein shall have the meanings ascribed to them in the Original Partnership Interest Pledge Agreement (as defined below)). 

RECITALS 
 WHEREAS, on August 30, 2010, Kansas City Southern de México, S.A. de C.V. (“KCSM”), as borrower, entered into a Credit Agreement for the maximum principal amount of
US$100,000,000.00 (one hundred million dollars 00/100, currency of the United States of America) (the “Original Credit Agreement”), with various financial institutions and other persons from time to time parties thereto or that
subsequently became parties thereto (including their successors and assigns) as lenders, The Bank of Nova Scotia, as administrative agent, Scotiabank Inverlat, S.A., Institución de Banca Múltiple, Grupo Financiero Scotiabank Inverlat,
as Collateral Agent, and The Bank of Nova Scotia and Banc of America Securities LLC, as joint lead arrangers and joint bookrunners. 
 WHEREAS, on August 30, 2010, Scotiabank Inverlat, S.A., Institución de Banca Múltiple, Grupo Financiero Scotiabank Inverlat, the Company and the Pledgors entered into a
Partnership Interest Pledge Agreement (Contrato de Prenda sobre Partes Sociales) (the “Original Partnership Interest Pledge Agreement”), under which the Pledgors granted a first priority lien in favor of Scotiabank Inverlat,
S.A., Institución de Banca Múltiple, Grupo Financiero Scotiabank Inverlat, acting as pledgee, in respect of the Collateral, to secure the due and punctual performance of the Obligations. A copy of the Original Partnership Interest
Pledge Agreement (without exhibits) is attached hereto as Exhibit “A”. 
 WHEREAS, on
September 30, 2011, KCSM, as borrower, entered into an Amended and Restated Credit Agreement to amend and restate the Original Credit Agreement in its entirety, including but not limited to, increase the maximum principal amount to
US$200,000,000.00 (two hundred million dollars 00/100, currency of the United States of America) (the “First Amended and Restated Credit Agreement”), with various financial institutions and other persons from time to time parties
thereto (including their successors and assigns) as lenders, JPMorgan Chase Bank, N.A., as administrative agent and as collateral agent, JPMorgan Securities, LLC and Merrill Lynch, Pierce, Fenner & Smith, Incorporated, as joint lead
arrangers and joint bookrunners, JPMorgan Securities LLC as Syndication Agent, BBVA Bancomer, S.A., Institución de Banca Múltiple, Grupo Financiero BBVA Bancomer as joint bookrunner and co-documentation agent and Bank of America N.A.
as co-documentation agent. 

 WHEREAS, on September 30, 2011, Scotiabank Inverlat, S.A., Institución de
Banca Múltiple, Grupo Financiero Scotiabank Inverlat, acting as substituted pledgee, the Pledgee, acting as substitute pledgee, the Pledgors, as pledgors and the Company, entered into an Assignment and Amendment Agreement (Contrato
Modificatorio y de Cesión) to the Original Partnership Interest Pledge Agreement (the “Assignment and Amendment Agreement” and the Original Partnership Interest Pledge Agreement as amended by the Assignment and Amendment
Agreement, the “Partnership Interest Pledge Agreement”), under which Scotiabank Inverlat, S.A., Institución de Banca Múltiple, Grupo Financiero Scotiabank Inverlat assigned and transferred all its rights and
obligations under the Original Partnership Interest Pledge Agreement to the Pledgee, and the Pledgee accepted such assignment and transfer. A copy of the Assignment and Amendment Agreement (without exhibits) is attached hereto as Exhibit
“B”. 
 WHEREAS, on November 29, 2012, KCSM, as borrower, various financial institutions and other
persons from time to time parties thereto or that subsequently became parties thereto (including their successors and assigns) as lenders, JPMorgan Chase Bank, N.A., as administrative agent and collateral agent, JPMorgan Securities, LLC and Merrill
Lynch, Pierce, Fenner & Smith, Incorporated, as joint lead arrangers and joint bookrunners, JPMorgan Securities LLC, as syndication agent and BBVA Bancomer, S.A., Institución de Banca Múltiple, Grupo Financiero BBVA Bancomer
and Bank of America, N.A., as co-documentation agents, entered into a Second Amended and Restated Credit Agreement to amend and restate the First Amended and Restated Credit Agreement in its entirety (the “Second Amended and Restated Credit
Agreement”, and Original Credit Agreement as amended and restated by the First Amended and Restated Credit Agreement and the Second Amended and Restated Credit Agreement, the “Credit Agreement”). A copy of the Second
Amended and Restated Credit Agreement (without exhibits) is attached hereto as Exhibit “C”. 

WHEREAS, the Parties hereto are entering into this Amendment Agreement to modify several clauses of the Partnership Interest
Pledge Agreement in order to reflect certain terms of the Second Amended and Restated Credit Agreement. 
 REPRESENTATIONS

  

	 	I.	Each of the Pledgors hereby represents and warrants that: 

 (a) HHH is a limited liability company with variable capital (sociedad de responsabilidad limitada de capital variable) and Nafta is a corporation with variable capital (sociedad anónima
de capital variable), duly organized and validly existing under the laws of the United Mexican States (“Mexico”) and is in compliance with its corporate and any other obligations under the laws of the jurisdiction of its
organization. 
 (b) It has the corporate power and authority to enter into this Amendment Agreement and has obtained all
required corporate authorizations and approvals to perform its obligations in the terms provided hereunder. 

  
 2 

 (c) Its attorney-in-fact is duly authorized to enter into this Amendment Agreement, which
authority has not been revoked or modified in any manner whatsoever. 
 (d) The execution and performance of this Amendment
Agreement, and the granting of the pledge under the Partnership Interest Pledge Agreement do not violate its by-laws or any other documents or any law, regulation, judgment or order applicable to it or any contract, agreement, deed or other
instrument to which it is a party or to which its rights and properties are subject or result in the creation or imposition of any lien, claim or rights of third parties upon or with respect to any such properties, other than the pledge under the
Partnership Interest Pledge Agreement. 
 (e) It is the legal and beneficial owner, free of any lien, encumbrances or ownership
limitations (except for the pledge and security interest created under the Partnership Interest Pledge Agreement) of the Collateral. 
 (f) It is willing to enter into this Amendment Agreement in order to amend several clauses of the Partnership Interest Pledge Agreement in order to reflect certain terms of the Second Amended and Restated
Credit Agreement. 
 (g) Other than as described herein, the execution of this Amendment Agreement does not affect the first
priority security interest in the Collateral granted under the Partnership Interest Pledge Agreement to secure the due and prompt satisfaction of any and all of the Obligations and all the necessary actions to perfect and protect such security
interest have been taken. 
 (h) Except as expressly stated herein, no consent of any other person and no authorization, permit,
approval or other action by, and no notice to or filing with, any governmental authority or regulatory body is required (i) for the Pledgors to execute this Amendment Agreement and to maintain the pledge by the Pledgors of the Collateral
pursuant to the Partnership Interest Pledge Agreement or for the execution or performance of this Amendment Agreement by the Pledgors, (ii) for the perfection or maintenance of the pledge on the Collateral created under the Partnership Interest
Pledge Agreement (including the first priority nature of such pledge) or (iii) to exercise the remedies in respect of the Collateral pursuant to the Partnership Interest Pledge Agreement. 

(i) By executing this Amendment Agreement, it expressly recognizes the existence of the Secured Parties and the legal capacity of the
Pledgee to act as Collateral Agent on behalf and for the benefit of Secured Parties in the execution of this Amendment Agreement and under the Partnership Interest Pledge Agreement, and the legal capacity and authority of its respective
representatives to execute this Amendment Agreement. 
  

	 	II.	The Pledgee hereby represents and warrants that: 

  
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 (a) It is a national association legally organized and validly existing under the laws of
the United States of America, acting on behalf and for the benefit of the Secured Parties, as Collateral Agent pursuant to the terms of the Credit Agreement. 
 (b) Its representative is duly authorized to enter into this Amendment Agreement, which authority has not been revoked or modified in any manner whatsoever. 

 

	 	III.	The Company hereby represents and warrants that: 

 (a) It is a limited liability company with variable capital (sociedad de responsabilidad limitada de capital variable), duly organized and validly existing under the laws of Mexico and is in
compliance with its corporate and any other obligations under the laws of the jurisdiction of its organization. 
 (b) It has
the corporate power and authority to enter into this Amendment Agreement and has obtained all required corporate authorizations and approvals to perform its obligations in the terms provided hereunder. 

(c) Its attorney-in-fact is duly authorized to enter into this Amendment Agreement, which authority has not been revoked or modified in
any manner whatsoever. 
 (d) The execution and performance of this Amendment Agreement, and the granting of the pledge under
the Partnership Interest Pledge Agreement do not violate its by-laws or any other documents or any law, regulation, judgment or order applicable to it or any contract, agreement, deed or other instrument to which it is a party or to which its rights
and properties are subject or result in the creation or imposition of any lien, claim or rights of third parties upon or with respect to any such properties. 
 (e) It is willing to enter into this Amendment Agreement in order to amend several clauses of the Partnership Interest Pledge Agreement in order to reflect certain terms of the Second Amended and Restated
Credit Agreement. 
 (f) Other than as described herein, the execution of this Amendment Agreement does not affect the first
priority security interest in the Collateral granted under the Partnership Interest Pledge Agreement to secure the due and prompt satisfaction of any and all of the Obligations and all the necessary actions to perfect and protect such security
interest have been taken. 
 (g) Except as expressly provided herein, no consent of any other person and no authorization,
permit, approval or other action by, and no notice to or filing with, any governmental authority or regulatory body is required (i) for the Pledgors to execute this Amendment Agreement and to maintain the pledge by the Pledgors of the
Collateral pursuant to the Partnership Interest Pledge Agreement or for the execution or performance of this Amendment Agreement by the Pledgors, (ii) for the perfection or maintenance of the pledge on the Collateral created under the
Partnership Interest Pledge Agreement (including the first priority nature of such pledge) or (iii) to exercise the remedies in respect of the Collateral pursuant to the Partnership Interest Pledge Agreement. 

  
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 (h) By executing this Amendment Agreement, it expressly recognizes the existence of the
Secured Parties and the legal capacity of the Pledgee to act as Collateral Agent on behalf and for the benefit of Secured Parties in the execution of this Amendment Agreement and under the Partnership Interest Pledge Agreement, and the legal
capacity and authority of its respective representatives to execute this Amendment Agreement. 
 NOW, THEREFORE the Parties have
agreed to the following: 
 CLAUSES 
 FIRST. Amendments to the Partnership Interest Pledge Agreement. 
 Effective as of the date hereof, the Parties hereby agree to amend certain clauses of the Partnership Interest Pledge Agreement, as described below: 

(a) Clause Fifth is hereby amended to read as follows: 
 “Clause Fifth. Term. 
 The pledge created hereunder
shall remain in full force and effect until the Termination Date (as defined in the Credit Agreement) has occurred. The number of the Pledged Partnership Interests subject to this Agreement shall not be reduced, notwithstanding the partial payment
of the Obligations. 
 Notwithstanding the foregoing, the pledge created hereunder shall be terminated, released
and discharged, prior to the Termination Date (as defined in the Credit Agreement), pursuant to Section 9.12 of the Credit Agreement.” 
 (b) The first paragraph of Clause Sixth is hereby amended to read as follows: 

Clause Sixth. Covenants of each Pledgor. 
 During the effectiveness of this Agreement, each Pledgor shall: 
  

... 
 (c) Clause Twelfth is hereby amended to read as follows: 

  
 5 

 Clause Twelfth. Release of Pledge. 

(i) Promptly after the occurrence of the Termination Date, or (ii) as soon as reasonably practicable after the
receipt by the Pledgee of a written notice from the Borrower stating that an Investment Grade Period (as defined in the Credit Agreement) has commenced and provided that no Event of Default (as defined in the Credit Agreement) shall have occurred
and be continuing, the Pledgee agrees to execute any documents that are necessary in order to release the pledge created hereunder, at the cost and expense of the Pledgors. The Pledgee shall not be required to make any representations or warranties
in any such release documents. 
 SECOND. Registration of this Amendment Agreement. 

(a) The Pledgors hereby agree to 
 (i) formalize this agreement before a Notary Public in Mexico on the date hereof; 

(ii) file this Amendment Agreement for registration with (i) the Public Registry of Property and Commerce of the Pledgors domicile
and (ii) the Registry of Guaranties on Movable Assets, within fifteen (15) calendar days following the date hereof (with such extensions as the Pledgee may grant in its sole discretion); and 

(iii) obtain and deliver to the Pledgee written confirmation, in terms satisfactory to the Pledgee, of the registration of this Amendment
Agreement with (i) the Registry of Guaranties on Movable Assets, within twenty (20) Business Days from the date of its filing before such registry (with such extensions as the Pledgee may grant in its discretion), and (ii) the Public
Registry of Property and Commerce, within one hundred and twenty (120) calendar days from the date of its filing before such registry (with such extensions as the Pledgee may grant in its sole discretion). 

THIRD. Ratification of the Terms of the Partnership Interest Pledge Agreement. 

The Parties agree and confirm that the only amendments to the Partnership Interest Pledge Agreement are those set forth in this Amendment
Agreement. The Pledgors and the Pledgee hereby confirm and ratify all of the terms and conditions of the Partnership Interest Pledge Agreement which are, and continue to be, in full force and effect. 

FOURTH. No Novation. 
 The execution of this Amendment Agreement shall not constitute (i) a novation (novación) of the obligations of the Pledgors and the Pledgee under the Partnership Interest Pledge
Agreement or (ii) a novation (novación), modification or payment of the Obligations. 
 FIFTH.
Notices. 

  
 6 

 (a) All notices and other communications related to this Amendment Agreement, shall be in
writing, in the English and Spanish languages, and shall be delivered or sent to the domiciles or facsimile numbers set forth below, or in any other domicile or facsimile number designated by each party or its representatives by written notice to
the other party. Such notices and communications shall be delivered or sent (i) by hand, (ii) by courier, or (iii) by facsimile. The parties for such effects designate the following domiciles: 

The Pledgors and the Company: 
 Montes
Urales No. 625 
 Col. Lomas de Chapultepec 
 11000, México D.F. 
 Facsimile: (5255) 9178 5600 ext. 22179 

Telephone: (5255) 9178 5647 
 Attention:
Legal Department (Departamento Jurídico) 
 The Pledgee: 
 JPMorgan Chase Bank, N.A. 
 Loan and Agency Services Group 

1111 Fannin, Floor 10 
 Houston, Texas 77002

 Telephone: (713) 750 1882 / (713) 427 6530 
 Facsimile: (713) 750 2938 
 Attention: Colton Rainey/Jide Williams 

cc: JPMorgan Chase Bank, N.A. 
 383 Madison
Avenue 
 New York, New York 10179 

Facsimile: (212) 270-5100 
 Attention:
Matthew Massie 
 (b) Any Party may change its domicile to receive notices pursuant to this Amendment Agreement by giving
written notice not less than five (5) Business Days prior to the date on which such change shall become effective in accordance with the provisions of this Clause. 
 (c) Any notice, if mailed and properly addressed with postage prepaid or if properly addressed and sent by pre-paid courier service, shall be deemed given when received; any notice, if transmitted by
facsimile, shall be deemed given when the confirmation of transmission thereof is received by the transmitter; provided that, as long as it is authorized by applicable law, the impossibility of delivering notices due to changes in the
addresses that have not been notified to the other Party hereto, or the refusal of any party to accept any notice, shall be considered received on the date of such delivery to the prior address or refusal to accept a notice. 

  
 7 

 SIXTH. Governing Law and Jurisdiction. 

This Amendment Agreement shall be governed by and construed in accordance with the federal laws of Mexico. For the interpretation,
construction, performance and enforcement of this Amendment Agreement, the Parties irrevocably submit to the jurisdiction of the federal courts located in the Federal District, and waive any right to any jurisdiction to which they may be entitled by
reason of their respective present or future domicile. 
 [signature pages follow] 

  
 8 

 IN WITNESS WHEREOF, the Parties execute this Amendment Agreement as of the date first
above written. 
  

	
	
	PLEDGORS
	
	 HIGHSTAR HARBOR HOLDINGS
 MEXICO, S. DE R.L. de C.V.

	
	/s/ Edgar Aguileta Gutiérrez
	 BY: Edgar Aguileta Gutiérrez

TITLE: Attorney-in-Fact

	
	PLEDGOR
	
	NAFTA RAIL, S.A. DE C.V.
	
	/s/ Edgar Aguileta Gutiérrez
	 BY: Edgar Aguileta Gutiérrez

TITLE: Attorney-in-Fact

	
	COMPANY
	
	MTC PUERTA MEXICO, S. DE R.L. de C.V.
	
	/s/ Edgar Aguileta Gutiérrez
	 BY: Edgar Aguileta Gutiérrez

TITLE: Attorney-in-Fact

  
 9 

	
	
	THE PLEDGEE
	
	 JPMORGAN CHASE BANK, N.A.,
 as Collateral Agent, acting on its own behalf and
 on behalf and for the benefit of
the Secured Parties

	
	/s/ Argel Becerra Adame
	 BY: Argel Becerra Adame
 TITLE: Attorney-in-Fact

  
 10 

 Exhibit “A” 

Original Partnership Interest Pledge Agreement (without exhibits) 

  
 11 

 Exhibit “B” 

Assignment and Amendment Agreement 

  
 12 

 Exhibit “C” 

Second Amended and Restated Credit Agreement (without exhibits) 

  
 13

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