The purpose of this executive order is to develop a rapid and transparent foreign defense sales system that enables effective defense cooperation between the United States and its chosen allied partners. It directs the secretary of state and secretary of war to: (1) reevaluate restrictions imposed by the Missile Technology Control Regime on Category I items (missiles, rockets and unmanned air vehicle systems) and consider supplying certain partners with specific Category I items; and (2) develop a list of priority partners for conventional arms transfers, as well as a list of priority end-items for potential transfers to those partners. Finally, it directs the secretary of state and secretary of war in consultation with the secretary of commerce to submit a plan to the president to improve the transparency of the United States defense sales to foreign partners, and to secure exportability as a requirement in the early stages of the sales process.