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 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. 1024. Biannual briefings on submarine readiness (a) In general Not later than 90 days after the date of the enactment of this Act, and once every 180 days thereafter until September 30, 2026, the Secretary of the Navy shall provide to the congressional defense committees a briefing on submarine maintenance and readiness. (b) Elements Each briefing required under subsection (a) shall include the following: (1) An overview of submarine maintenance activities, including— (A) the original estimated schedule for completion of attack, ballistic, and guided missile submarine depot-level maintenance activities