; and (ii) is more operationally effective and survivable than the existing EC–130H Compass Call aircraft platform. E Defense-wide, joint, and multiservice matters 151. Multiyear procurement authority for C–130J aircraft program (a) Authority for multiyear procurement Subject to section 2306b of title 10, United States Code, the Secretary of the Air Force may enter into one or more multiyear contracts, beginning with the fiscal year 2019 program year, for the procurement of C–130J aircraft and, acting as the executive agent for the Department of the Navy, for the procurement of C–130J aircraft. (b) Authority for advance procurement and economic order quantity The Secretary of the Air Force may enter into one or more contracts for advance procurement associated with the C–130J aircraft, including economic order quantity, for which authorization to enter into a multiyear procurement contract is provided under subsection (a). (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 2019 is subject to the availability of appropriations for that purpose for such later fiscal year. (d) Treatment of fiscal year 2018 aircraft The multiyear contract authority under subsection (a) includes C–130J aircraft for which funds were appropriated for fiscal year 2018. 152. Quarterly updates on the F–35 Joint Strike Fighter program (a) In general Beginning not later than October 1, 2018, and on a quarterly basis thereafter through October 1, 2024, the Under Secretary of Defense for Acquisition and Sustainment shall provide to the congressional defense committees a briefing on the progress of the F–35 Joint Strike Fighter program. (b) Elements Each briefing under subsection (a) shall include, with respect to the F–35 Joint Strike Fighter program, the following elements: (1) An overview of the program schedule. (2) A description of each contract awarded under the program,