accordance with section 8005 of this Act. 8137. None of the funds appropriated or otherwise made available by this or any other Act may be obligated to integrate an alternative engine on any F–35 aircraft. 8138. Funds appropriated in title III of this Act may be used to enter into a contract or contracts for the procurement of airframes and engines for the CH–53K heavy lift helicopter program. 8139. The Secretary of Defense may use up to $650,000,000 of the amounts appropriated or otherwise made available in this Act to the Department of Defense for the rapid acquisition and deployment of supplies and associated support services pursuant to section 3601 of title 10, United States Code, but only for the purposes specified in clauses (i), (ii), (iii), and (iv) of subsection (c)(3)(B) of such section and subject to the applicable limits specified in clauses (i), (ii), and (iii) of such subsection and, in the case of clause (iv) of such subsection, subject to a limit of $50,000,000, or for the purposes specified in section 229 of the National Defense Authorization Act for Fiscal Year 2024 ( Public Law 118–31 ) and subject to a limit of $100,000,000: Provided, That the Secretary of Defense shall notify the congressional defense committees promptly of all uses of this authority. 8140. There is appropriated to the Department of Defense Credit Program Account established pursuant to section 903(b)(5) of the National Defense Authorization Act for Fiscal Year 2024 ( Public Law 118–31 ), $49,200,000, to remain available until September 30, 2026, for the cost of loans and loan guarantees pursuant to section 903(b) of such Act for a pilot program on capital assistance to support defense investment in the industrial base: Provided, That such costs, including the cost of modifying such loans, shall be as defined in section 502 of the Congressional Budget Act of 1974: Provided further, That such amounts are available to subsidize gross obligations for the principal amount of direct loans, and total loan principal, any part of