| Ex. FED-052 | Security Directive SD 1582/84-21-01B, Security Measures - Mask RequirementsSD 1582/84-21-01B, Security Measures - Mask Requirements (cancels and supersedes SD 1582/84-21-01A) | Transportation Security Administration, DHS | United States (surface transportation owner/operators)Federal | Aug. 20, 2021 | 2021 Q3 | Face-covering requirementTravel and quarantineWorkplace rules | Primary source read | |
| Ex. FED-051 | Security Directive SD 1582/84-21-01A, Security Measures - Mask RequirementsSD 1582/84-21-01A, Security Measures - Mask Requirements (cancels and supersedes SD 1582/84-21-01) | Transportation Security Administration, DHS | United States (surface transportation owner/operators)Federal | Apr. 30, 2021 | 2021 Q22021 Q3 | Face-covering requirementTravel and quarantineWorkplace rules | Primary source read | |
| Ex. ECO-B-006 | Security Directive SD 1582/84-21-01ASecurity Directive 1582/84-21-01A: Security Measures - Mask Requirements (surface transportation) | Transportation Security Administration (DHS) | United StatesFederal | Apr. 30, 2021 | 2021 Q22021 Q3 | Face-covering requirementTravel and quarantine | Primary source read | |
| Ex. ECO-B-007 | Security Directive SD 1582/84-21-01BSecurity Directive 1582/84-21-01B: Security Measures - Mask Requirements (surface transportation) | Transportation Security Administration (DHS) | United StatesFederal | Aug. 20, 2021 | 2021 Q3 | Face-covering requirementTravel and quarantine | Primary source read | |
| Ex. FED-056 | Notification of Ratification of Security Directives and Emergency Amendment (TSA SD 1542-21-01, SD 1544-21-02, EA 1546-21-01)Ratification of Security Directives and Emergency Amendment, 86 Fed. Reg. 26825 (May 18, 2021) | Department of Homeland Security, Office of Strategy, Policy, and Plans; Transportation Security Oversight Board | United StatesFederal | Apr. 20, 2021 | 2021 Q22021 Q3 | Face-covering requirementTravel and quarantine | Primary source read | |
| Ex. FED-057 | Determination of a National Emergency Requiring Actions To Protect the Safety of Americans Using and Employed by the Transportation System (Jan. 27, 2021)Determination of a National Emergency Requiring Actions To Protect the Safety of Americans Using and Employed by the Transportation System… | Acting Secretary of Homeland Security David P. Pekoske | United States transportation systemFederal | Jan. 27, 2021 | 2021 Q12021 Q22021 Q3 | Emergency declarationTravel and quarantine | Primary source read | |
| Ex. FED-061 | Executive Order 13998Promoting COVID-19 Safety in Domestic and International Travel, 86 Fed. Reg. 7205 (Jan. 26, 2021) | President Joseph R. Biden, Jr. | United States (domestic and international travel)Federal | Jan. 21, 2021 | 2021 Q12021 Q22021 Q3 | Face-covering requirementTravel and quarantine | Primary source read | |