This bill would ban non-U.S. citizens from entering or accessing any Department of Energy facilities and sites, with a narrow exception for citizens of Australia, Canada, New Zealand, and the United Kingdom—collectively known as the "Five Eyes" intelligence alliance. The legislation applies broadly to all DOE-owned, operated, or leased properties and would take effect 60 days after enactment. The Secretary of Energy would have the same 60-day window to update all relevant regulations, guidelines, policies, and procedures to enforce this restriction. The bill contains no specific funding amounts or authorization requirements, as it primarily mandates a security access restriction rather than appropriating money for new programs.