Transportation Security Administration, Security Directive 1580-21-01 series and Security Directive 1580/82-2022-01 series; Department of Homeland Security, “Ratification of Securi

Transportation Security Administration, Security Directive 1580-21-01 series and Security Directive 1580/82-2022-01 series; Department of Homeland Security, “Ratification of Security Directives,” Federal Register, January 21, 2025 (summarizing the December 2021 requirements and the 2022 series’ implementation plan and assessment program requirements).