Final rule · 2025-01422

Ratification of Security Directives

The Department of Homeland Security (DHS) is publishing official notice that the Transportation Security Oversight Board (TSOB) has ratified Transportation Security Administration (TSA) Security Directive 1580-21-01B, Security Directive 1582-21-01B, Security Directive 1580/82-2022-01A, and Security Directive 1580/82-2022-01C applicable to owners and operators of critical rail entities (owners/ operators). Security Directive 1580-21-01B and Security Directive 1582- 21-01B extended the requirements of 1580-21-01 and 1582-21-01 series for an additional year, with minor revisions. Security Directive 1580/ 82-2022-01A and Security Directive 1580/82-2022-01C extend the performance-based requirements of the 1580/82-2022-01 series for an additional year and amends them to strengthen their effectiveness and address emerging cyber threats.