Navy for Research, Development and Acquisition, not more than 85 percent may be obligated or expended until the date on which the Assistant Secretary of the Navy for Research, Development and Acquisition submits to the congressional defense committees the feasibility study required by subsection (b). (b) Feasibility study required (1) In general Not later than 180 days after the date of the enactment of this Act, the Secretary of Defense, acting through the Assistant Secretary of the Navy for Research, Development and Acquisition, shall conduct a study to analyze the feasibility and advisability of accelerating the provision of Harpoon missiles to foreign security partners under existing Foreign Military Sales cases, additional appropriations, and pursuant to the authority provided under section 506 of the Foreign Assistance Act of 1961 ( 22 U.S.C. 2318 ) or section 333 of title 10, United States Code. (2) Elements The study required by paragraph (1) shall, at a minimum, include the following: (A) A list of existing Foreign Military Sales cases for Harpoon missiles to foreign security partners. (B) The current timeline for the delivery of Harpoon missiles under each of the Foreign Military Sales cases identified under subparagraph (A). (C) A detailed analysis of contracting timelines for Harpoon missiles procured by foreign security partners through the Foreign Military Sales process and recommendations, if any, for accelerating such contracting timelines. (D) An analysis of the feasibility and advisability of accelerating the provision of Harpoon missiles to foreign security partners under existing Foreign Military Sales cases, including through— (i) additional appropriations