The purpose of this legislation is to clarify the authority of the Department of Energy regarding the disposal of certain foreign-origin radioactive materials, specifically americium-241, at the Waste Isolation Pilot Plant (WIPP). The goal is to ensure that these materials can be safely disposed of, reducing the risk of them being used in harmful ways, such as in a dirty bomb. Key provisions of the legislation include a clear definition of the types of materials that can be disposed of at WIPP.