The ICE Security Reform Act of 2025 mandates the separation of Homeland Security Investigations (HSI) from U.S. Immigration and Customs Enforcement (ICE) to establish HSI as an independent agency within the Department of Homeland Security. The bill also renames the remaining ICE organization to U.S. Immigration Compliance Enforcement (USICE). This reorganization includes provisions to update investigative guidelines, clarify agency roles, and ensure the seamless transfer of personnel, assets, and legal responsibilities.