This bill allows the Secretary of Defense to carry out environmental restoration projects at National Guard and Air National Guard facilities. Currently, federal environmental cleanup authority is limited primarily to facilities owned and operated by the Department of Defense itself. The legislation removes ownership and jurisdictional restrictions so that the Secretary can address contamination and environmental hazards at Guard facilities regardless of whether they are state-owned or under federal control. This change affects National Guard and Air National Guard installations across all states and territories that may have environmental contamination requiring remediation. The bill makes technical updates to federal law to align environmental restoration programs and funding mechanisms to include these Guard facilities under the same cleanup authorities previously available only to traditional military installations.