of the United States to make a payment under the contract for a fiscal year after fiscal year 2018 is subject to the availability of appropriations or funds for that purpose for such fiscal year. (b) Modification to procurement of additional arleigh burke class destroyer Section 125(a)(1) of the National Defense Authorization Act for Fiscal Year 2016 ( Public Law 114–92 ) is amended by striking to be procured either and inserting to be procured using a fixed-price contract either . 123. Multiyear procurement authority for V–22 joint aircraft program (a) Authority for multiyear procurement Subject to section 2306b of title 10, United States Code, the Secretary of Defense may enter into one or more multiyear contracts, beginning with the fiscal year 2018 program year, for the procurement of V–22 aircraft. Notwithstanding subsection (k) of such section 2306b, the Secretary of Defense may enter into a multiyear contract under this section for up to five years. (b) 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 2018 is subject to the availability of appropriations for that purpose for such later fiscal year. 124. Design and construction of amphibious ship replacement designated LX(R) or amphibious transport dock designated LPD–30 (a) In general The Secretary of the Navy may enter into a contract, beginning with the fiscal year 2018 program year, for the design and construction of the amphibious ship replacement designated LX(R) or the amphibious transport dock designated LPD–30 using amounts authorized to be appropriated for the Department of Defense for Shipbuilding and Conversion, Navy. (b) Use of incremental funding With respect to the contract entered into under subsection (a), the Secretary may use incremental funding to make payments under the contract. (c) Condition for out-year contract payments The contract entered into under subsection (a)