; and (4) a certification that any contract award or awards for new Navy port waterborne security barriers will result from full and open competition to the maximum extent practicable. 125. Multiyear procurement authority for Standard Missile-6 (a) Authority for multiyear procurement Subject to section 2306b of title 10, United States Code, the Secretary of the Navy may enter into one or more multiyear contracts, beginning with the fiscal year 2019 program year, for the procurement of up to 625 Standard Missile–6 guided missiles. (b) Authority for advance procurement and economic order quantity The Secretary may enter into one or more contracts for advance procurement associated with the missiles (including economic order quantity) for which authorization to enter into a multiyear procurement contract is provided under subsection (a). (c) Cost analysis requirement The Secretary may not exercise the authority provided under subsection (a) or (b) until the Secretary of Defense submits to the congressional defense committees the report and confirmation required under subparagraphs (A) and (B), respectively, of section 2306b(i)(2) of title 10, United States Code. (d) 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 2019 is subject to the availability of appropriations for that purpose for such later fiscal year. 126. Limitation on availability of funds for the Littoral Combat Ship (a) Limitation None of the amounts authorized to be appropriated by this Act or otherwise made available for the Department of Defense for fiscal year 2019 may be used to exceed the total procurement quantity listed in revision five of the Littoral Combat Ship acquisition strategy unless the Under Secretary of Defense for Acquisition and Sustainment submits to the congressional defense committees the certification described in subsection (b). (b) Certification The certification