This bill modifies how the Department of Defense requires its contractors to disclose the sources of rare earth elements and strategic materials used in military equipment. Specifically, it expands existing disclosure requirements to cover advanced batteries and battery components in addition to permanent magnets, and requires contractors to identify which countries are involved in mining, refining, processing, and manufacturing these materials at each stage of production. The legislation affects all defense contractors who supply systems containing these materials to the Pentagon. The bill also updates definitions to include lithium, nickel, cobalt, manganese, and graphite as covered minerals that must be tracked. No specific funding or implementation timeline is mentioned in the legislation.