; or (2) material or equipment in economic order quantities when cost savings are achievable. (c) Condition for out-year contract payments A contract entered into under subsection (a) shall provide that any obligation of the United States to make a payment under the contract for a fiscal year after fiscal year 2025 is subject to the availability of appropriations or funds for that purpose for such later fiscal year. (d) Limitation on termination liability A contract for the construction of Virginia class submarines entered into under subsection (a) shall include a clause that limits the liability of the United States to the contractor for any termination of the contract. The maximum liability of the United States under the clause shall be the amount appropriated for the submarines covered by the contract regardless of the amount obligated under the contract. (e) Virginia class submarine defined The term Virginia class submarine means a block VI configured Virginia class submarine. 124. Procurement authority for Auxiliary Personnel Lighter program (a) Contract authority Beginning in fiscal year 2024, the Secretary of the Navy may enter into one or more contracts for the procurement of up to six Auxiliary Personnel Lighter class vessels and associated material. (b) Liability Any contract entered into under subsection (a) shall provide that— (1) any obligation of the United States to make a payment under the contract is subject to the availability of appropriations for that purpose