Amend. No.1 to Amended and Restated Decl. Of Trust and Trust Agreement of Co Reg



 Exhibit 4.2.1 
 AMENDMENT NO. 1 TO THE 
 AMENDED AND RESTATED 
 DECLARATION OF TRUST AND TRUST AGREEMENT 
 OF 
 DB MULTI-SECTOR COMMODITY MASTER TRUST 
 This Amendment No. 1 (“Amendment No. 1”) to the Amended and Restated Declaration of Trust and Trust Agreement, dated as of
November 21, 2006 (the “Declaration of Trust”), of DB Multi-Sector Commodity Master Trust (the “Trust”) by and between DB Commodity Services LLC (the “Managing Owner”) and Wilmington Trust
Company. 
 WHEREAS, the Managing Owner has deemed it advisable for the Trust to amend the Declaration of Trust to memorialize changes
in certain allocation provisions disclosed in the Declaration of Trust as previously agreed to by the Trust and the Managing Owner; 
 WHEREAS, the Managing Owner wishes to amend the Declaration of Trust pursuant to Section 11.1(b)(iii) thereof to give effect to the foregoing. 
 NOW, THEREFORE, in consideration of the premises and of other good and valuable consideration, the receipt and sufficiency of all of which are hereby acknowledged, the Declaration of Trust is amended as
follows: 
  

	 	1.	Section 6.3 of the Declaration of Trust shall be amended and replaced in its entirety as follows: 

 “SECTION 6.3 Daily Allocations. All allocations to Shareholders of items included within the Master Fund’s Profits and Losses
attributable daily shall be allocated solely among the Shareholders recognized as shareholders as of the close of business of each Business Day, as follows: 
 (a) For purposes of maintaining each Master Fund’s Capital Accounts and in determining the rights of the Shareholders among themselves, except as otherwise provided in this Article VI, each item of income, gain,
loss and deduction shall be allocated among Shareholders in accordance with their respective Percentage Interests. 
 (b) Any item of loss or
deduction otherwise allocated to the Managing Owner pursuant to Section 6.3(a) which is in excess of such Managing Owner’s positive Adjusted Capital Account balance (following adjustment to reflect the allocation of all other items for
such period) shall instead be allocated to the other Shareholders in accordance with their respective Percentage Interests to the extent such item of loss or deduction exceeds such Managing Owner’s Adjusted Capital Account balance; provided
that the allocation of any such item to such other Shareholders shall only be made hereunder to the extent the allocation would not result in or increase a negative balance in the Adjusted Capital Account of such other Shareholders. If such an
allocation occurs, items of income or gain that would otherwise be allocated to the Managing Owner equal to the amount of such allocated loss or deduction will be allocated to the other Shareholders in accordance with their Percentage Interests as
quickly as possible. 







 (c) If any Shareholder unexpectedly receives any adjustments, allocations or distributions described in
Treasury Regulation sections 1.704-1(b)(ii)(d)(4), (5) or (6), items of Master Fund income and gain shall be specially allocated to such Shareholder in an amount and manner sufficient to eliminate a deficit in its Adjusted Capital Account
created by such adjustments, allocations or distributions as quickly as possible. This section 6.3(c) is intended to constitute a “qualified income offset” within the meaning of Treasury Regulation section 1.704-1(b)(2)(ii)(d). 

(d) Notwithstanding any other provision of this Agreement, upon or prior to the issuance of additional Shares, the Managing Owner shall have the sole
and complete discretion, without the approval of any other Shareholder, to amend any provision of this Article VI in any manner, as is necessary, appropriate or advisable to comply with any current or future provisions of the Code or the Treasury
Regulations or to implement the terms and conditions of any Shares.” 
  

	 	2.	This Amendment No. 1 to the Declaration of Trust shall be governed by, and construed in accordance with, the laws of the State of Delaware. 

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 IN WITNESS WHEREOF, this Amendment
No. 1 has been executed for and on behalf of the undersigned as of the 26th day of December, 2007. 
  

			
	DB COMMODITY SERVICES LLC, as
	Managing Owner
		
	By:	 	 /s/ Kevin Rich

	Name:	 	Kevin Rich
	Title:	 	Director and
		 	Chief Executive Officer
		
	By:	 	 /s/ Gregory Collett

	Name:	 	Gregory Collett
	Title:	 	Chief Operating Officer


 Acknowledged: 
  


			
	WILMINGTON TRUST COMPANY, not in its individual capacity but solely as Trustee of the Trust
		
	By:	 	 /s/ James A. Hanley

	Name:	 	James A. Hanley
	Title:	 	Assistant Vice President

  

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