; and (B) disregarded when measuring attainment of any goal or benchmark established under agency-level or Governmentwide guidance on category management, best in class solutions, common contract solutions, or successor strategies for contract consolidation, unless considering the acquisition aids in the achievement of the goal or benchmark. (3) Prohibition Once a contract has been awarded under the section 8(a), 8(m), 31, or 36 or under subsection (a) or (j) of this section, including an acquisition for commercial items, the contract shall not be removed and placed in category management, best in class solutions, common contract solutions, or successor strategies for contract consolidation. . (6) Prompt payments Notwithstanding any other provision of law or regulation, during any period in which the President invokes the authorities of the Defense Production Act of 1950 ( 50 U.S.C. 4501 et seq.), for any payment due by the head of an agency on a contract for an item of property or service provided— (A) with respect to a prime contractor (as defined in section 8701 of title 41, United States Code) that is a small business concern or nonprofit organization, the head of the agency shall, to the fullest extent permitted by law and to the maximum extent practicable, establish an accelerated payment date of 15 days after a proper invoice for the amount due is received