; and (2) that the United States shipbuilding defense industrial base is fundamental to achieving the shipbuilding requirements of the Navy and constitutes a unique national security imperative that requires sustainment and support by the Navy and Congress. . 1021. Prohibition on retirement of certain naval vessels None of the funds authorized to be appropriated by this Act for fiscal year 2024 may be obligated or expended to retire, prepare to retire, or place in storage any of the following naval vessels: (1) USS Germantown (LSD 42). (2) USS Gunston Hall (LSD 44). (3) USS Tortuga (LSD 46). (4) USS Shiloh (CG 67). 1022. Authority to use incremental funding to enter into a contract for the advance procurement and construction of a San Antonio-class amphibious ship (a) In general Amounts authorized to be appropriated by this Act or otherwise made available for the Navy for Shipbuilding and Conversion for any of fiscal years 2023 through 2025 may be used by the Secretary of the Navy to enter into an incrementally funded contract for the advance procurement and construction of a San Antonio-class amphibious ship. (b) Availability of funds A contract entered into under subsection (a) shall provide that any obligation of the United States to make a payment under the contract is subject to the availability of appropriations for that purpose, and that total liability to the Government for the termination of the contract shall be limited to the total amount of funding obligated at time of termination. 1023. Authority to use incremental funding to enter into a contract for the advance procurement and construction of a submarine tender (a) In general Amounts authorized to be appropriated by this Act or otherwise made available for the Navy for Shipbuilding and Conversion for fiscal year 2024 may be used by the Secretary of the Navy to enter into an incrementally funded contract for the advance procurement and construction of a submarine tender. (b) Availability of funds A contract entered into under subsection (a) shall