The purpose of this legislation is to amend the Arms Export Control Act to create an exemption for the United Kingdom regarding the licensing of defense items for export. This means that the U.S. can export certain military goods to the UK without needing to establish a specific bilateral agreement, which simplifies the process. Key provisions of the legislation include the addition of the United Kingdom to a list of countries that can receive defense items without a bilateral agreement. It also outlines exceptions related to defense cooperation treaties, particularly one between the U.S.