The AUKUS Improvement Act of 2025 aims to enhance the AUKUS partnership, which involves the United States, Australia, and the United Kingdom. The main objectives of this legislation are to streamline defense cooperation and facilitate arms transfers among these countries. Key provisions of the Act include changes to the Arms Export Control Act. It allows for more flexibility in how defense articles—such as weapons and military equipment—can be transferred between the U.S., Australia, and the U.K.