Document:

Amendment No. 2 to the Master Trust Agreement

 Exhibit 10.47 
 AMENDMENT NO. 2 TO 
 THE MASTER TRUST AGREEMENT 
 WHEREAS, Dynegy Inc., Illinova Corporation, Illinova Generating Company and Ameren Corporation entered into that certain Stock Purchase Agreement dated
as of February 2, 2004 (the “Agreement”) under which Ameren Corporation will acquire all of the outstanding common and preferred stock of Illinois Power Company owned by Illinova Corporation; 
 WHEREAS, as a result of the transaction contemplated under the Agreement, the name of the plans formerly known as the Illinois Power Company Incentive
Savings Plan and the Illinois Power Company Incentive Savings Plan for Employees Covered Under a Collective Bargaining Agreement will be changed to the Dynegy Midwest Generation, Inc. 401(k) Savings Plan and the Dynegy Midwest Generation, Inc.
401(k) Savings Plan for Employees Covered Under a Collective Bargaining Agreement, respectively, effective immediately prior to the “Closing Date” of the Agreement, as such term is defined under Section 2.4 of the Agreement (the
“Closing Date”); 
 WHEREAS, pursuant to Article X of the Master Trust Agreement entered into between Dynegy Inc. and Vanguard
Fiduciary Trust Company and as subsequently amended (the “Master Trust”), Dynegy Inc. may amend the Master Trust by delivery of an instrument in writing to the Vanguard Fiduciary Trust Company; 
 NOW, THEREFORE, in consideration of the above premises, the Master Trust is hereby amended as follows effective immediately prior to the Closing Date:

 I. 
 The first WHEREAS clause
of the Master Trust is hereby amended and restated to provide as follows: 
 “WHEREAS, the Employer or an affiliate of the Employer has
adopted and is maintaining the Dynegy Inc. 401(k) Savings Plan, the Dynegy Midwest Generation, Inc. 401(k) Savings Plan, the Dynegy Midwest Generation, Inc. 401(k) Savings Plan for Employees Covered Under a Collective Bargaining
Agreement, the Extant, Inc. 401(k) Plan, and the Dynegy Northeast Generation, Inc. Savings Incentive Plan (each such plan to be referred to individually as “Plan” and collectively as “Participating Plans”) each for the
exclusive benefit of certain of its Employees; and”. 

 II. 
 Except as modified herein, the Master Trust shall remain in full force and effect. 
 IN WITNESS WHEREOF, the undersigned has caused
this Amendment No. 2 to the Master Trust to be executed this 29 day of September 2004, to be effective as of the Closing Date. 
  

			
	DYNEGY INC.
		
	By:	 	 /s/ J. Kevin Blodgett

		 	J. Kevin Blodgett
	Title:	 	Sr. Vice President, Human Resources

  

 2Amendment to Master Trust Agreement

 Exhibit 10.48 
 AMENDMENT TO 
 MASTER TRUST AGREEMENT 
 THIS AMENDMENT to the Master Trust Agreement (the “Amendment”) is entered into as of January 1, 2006, between DYNEGY INC., an Illinois
corporation (the “Employer”) and VANGUARD FIDUCIARY TRUST COMPANY, a trust company incorporated under Chapter 10 of the Pennsylvania Banking Code (the “Master Trustee”). 
 WITNESSETH 
 WHEREAS, the Employer and the Dynegy Inc. Benefit Plans Committee
(the “Plan Administrator”) have entered into an agreement (the “FCI Agreement”) with Fiduciary Counselors Inc. (the “Independent Fiduciary”) pursuant to which the Independent Fiduciary was appointed by the Plan
Administrator to have the sole and exclusive fiduciary responsibility with respect to the continued offering and operation of the Dynegy Stock Fund and with respect to the continued holding of Class A common stock of the Employer (“Company
Stock”) in the Participating Plans (as defined in the Master Trust Agreement); 
 WHEREAS, pursuant to the FCI Agreement, the
Independent Fiduciary received certain powers to direct the Master Trustee with respect to the Dynegy Stock Fund and the Company Stock, and the Independent Fiduciary agreed to perform certain duties with respect to the Dynegy Stock Fund and the
Company Stock; and 
 WHEREAS, the Employer and the Master Trustee deem it necessary and desirable to amend the Master Trust Agreement to
reflect the appointment of the Independent Fiduciary and to authorize it to have certain powers and to perform the duties specified in this Amendment with respect to the Dynegy Stock Fund and the Company Stock. 
 NOW, THEREFORE, in consideration of the mutual covenants herein contained, the parties hereto, intending to be legally bound, hereby agree and declare as
follows: 
 1. The third sentence of Section 1.3 of the Master Trust is hereby amended in its entirety to provide as follows: 

“The Plan Administrator may also direct the Master Trustee to deliver assets of this Fund to any of the trust agreements under the Participating
Plans.” 
 2. Section 2.1 of the Master Trust is hereby amended in its entirety to provide as follows: 
 “The Plan Administrator shall have the exclusive authority and discretion to select the investment funds available for investment under the
Participating Plans, other than the Dynegy Stock Fund, which shall be offered as an investment fund available for investment under the Participating Plans in accordance with the provisions of the Participating Plans and Section 2.4 hereof (the
selected investment funds and the 

  

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Dynegy Stock Fund are collectively referred to as the “Investment Funds”). The Plan Administrator shall notify the Trustee in writing of the
selection of the Investment Funds currently available for investment under the Participating Plans, and any changes thereto. The purpose of the Master Trust is to facilitate the investment of the assets of the Participating Plans.” 

3. Subsection 2.2(a) of the Master Trust is hereby amended by adding the phrase, “subject to the provisions of Section 2.4,” to the
beginning thereof. 
 4. Subsection 2.2(b) of the Master Trust is hereby amended in its entirety to provide as follows: 
 “(b) to dispose of all or any part of the investments, securities other than Company Stock, or other property which may from time to
time or at any time constitute the Fund or portion thereof in accordance with the directions by the Plan Administrator furnished to it pursuant to Section 1.3, or to dispose of all or any part of the Company Stock which may from time to time or
at any time constitute a portion of the Fund in accordance with the directions by the Independent Fiduciary pursuant to Section 2.4, and to make, execute and deliver to the purchasers thereof good and sufficient deeds of conveyance therefore,
and all assignments, transfers and other legal instruments, either necessary or convenient for passing the title and ownership thereto, free and discharged of all trusts and without liability on the part of such purchasers to see to the application
of the purchase money;” 
 5. A new Section 2.4 is hereby added to the Master Trust to provide as follows: 
 “Section 2.4. Notwithstanding any other provision of this Agreement to the contrary, the Independent Fiduciary shall have the sole
and exclusive authority to determine whether acquiring or holding Company Stock in the Participating Plans and Master Trust is no longer consistent with the Employee Retirement Income Security Act of 1974, as amended (“ERISA”), and it
shall be the sole named fiduciary for such purpose. If the Independent Fiduciary makes such a determination, it shall have the power to determine whether to: 
  

	 	(a)	prohibit or limit (for example, as a percentage of a Participant’s account) further purchases or holdings of Company Stock or increasing the Dynegy Stock Fund’s holding of
cash or cash equivalent investments, and in the event of such prohibition or limitation, to designate, as necessary, an alternative investment fond for the investment of the proceeds pending further investment directions by the Participating
Plans’ Participants and beneficiaries; 

  

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	 	(b)	liquidate some or all of the Participating Plans’ holdings in Company Stock and determine how such liquidation should be accomplished and in the event of such liquidation, to
designate, as necessary, an alternative investment fund for the investment of the proceeds pending further investment directions by the Participating Plans’ Participants and beneficiaries; or 

  

	 	(c)	terminate the availability of the Dynegy Stock Fund as an investment option under such Participating Plans on such terms and conditions as the Independent Fiduciary shall deem
prudent and in the interest of the Participating Plans and their Participants and beneficiaries (and notwithstanding any Participant or beneficiary investment directions to the contrary), including the determination of the manner and timing of
termination of the Dynegy Stock Fund and orderly liquidation of its assets and designation of an alternative investment fund for the investment of the proceeds pending further investment directions by the Participating Plans’ Participants and
beneficiaries. 

 The Independent Fiduciary shall direct the Master Trustee to take such actions as are necessary and
appropriate to implement and administer the Independent Fiduciary’s determinations under this Section 2.4, and the Master Trustee shall be fully entitled to rely on such directions, and the Master Trustee shall be under no duty to
ascertain whether such directions are in accordance with the provisions of the Participating Plans.” 
 6. Section 3.1 of the
Master Trust is hereby deleted and the remaining Sections of Article III renumbered accordingly. 
 7. The second sentence of
Section 4.5 of the Master Trust is hereby amended in its entirety to provide as follows: 
 “The Master Trustee shall be the
fiduciary who is responsible for ensuring that such procedures are sufficient to safeguard the confidentiality of the information described above and that such procedures are followed; provided, however, the Independent Fiduciary shall be the
fiduciary responsible for ensuring the confidentiality of the proxy voting process.” 
 8. A new Section 4.6 is hereby added to the
Master Trust to provide as follows: 
 “Section 4.6. The Independent Fiduciary shall direct the Master Trustee to execute and deliver
such forms and other documents as the Independent Fiduciary may determine are advisable to be filed with the Securities and Exchange Commission or other governmental agency, and the Master Trustee shall be fully entitled to rely on such
directions.” 
  

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 9. Sections 6.1 and 6.2 of the Master Trust are hereby amended by adding the phrase “or the
Independent Fiduciary” immediately following the term “Plan Administrator” in such Sections. 
 10. This Amendment may be
executed in separate counterparts, which together shall constitute one agreement. 
 IN WITNESS WHEREOF, the parties hereto have executed
this Amendment as of the day and year first written above. 
  

			
	 DYNEGY INC.

		
	By:	 	 (Illegible)

	Title:	 	Vice President, HR
	
	VANGUARD FIDUCIARY TRUST COMPANY
		
	By:	 	 /s/ Dennis Simmons

		 	Dennis Simmons
	Title:	 	Principal

  

			
	 AGREED TO AND APPROVED BY:

	
	 FIDUCIARY. COUNSELORS INC.

		
	 By:
	 	 (Illegible)

	 Title:
	 	 President & CEO

  

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