| 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. LAW-305 | 49 U.S.C. 114 (2023 ed.)Transportation Security Administration; (l)(2) emergency regulations and security directives | Congress of the United States | United States or State (legal authority; see citation)Legal authority | Jan. 1, 2024 | 2020 Q22020 Q32020 Q42021 Q12021 Q22021 Q3 | Legal authorityOther | Primary source read | |
| Ex. MET-MKE-044 | Federal Mask Mandate for Public Transportation Extended (release of Aug. 23, 2021)Masks required on all MCTS buses regardless of vaccination status through at least January 18, 2022 | Milwaukee County Transit System (implementing the TSA Security Directive and CDC order) | Milwaukee County, Wisconsin (Milwaukee County Transit System)County | Aug. 23, 2021 | 2021 Q12021 Q22021 Q3 | Face-covering requirementTravel and quarantine | Primary source read | |
| Ex. AGY-ST-TRANSPORT-PORTS-TRANSIT-072 | RIPTA 'Response to Coronavirus (COVID-19)' page, updated June 7, 2021: masks required at all times per federal law (TSA); 'Failure to comply will result in denial of boarding or removal, and may result in penalties'; disability exemptions only by prior request; transit centers and Photo ID offices still closed; free rides to vaccination appointments; transit for essential travel onlyRIPTA's Response to Coronavirus (COVID-19) - UPDATED: June 7, 2021 (TSA mask requirement; denial of boarding; transit centers closed) | Rhode Island Public Transit Authority (RIPTA) | Rhode Island (statewide)State | June 7, 2021 | 2021 Q12021 Q22021 Q3 | Business closureFace-covering requirementTravel 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 | |
| Ex. MET-MSY-037 | RTA notice implementing the federal mask mandate for public transitRTA follows federal mask mandate for public transit | New Orleans Regional Transit Authority (applying the CDC order of Jan. 29, 2021 and TSA Security Directive) | New Orleans Regional Transit Authority (Orleans Parish)Sector regulator | Feb. 1, 2021 | 2021 Q12021 Q22021 Q3 | Face-covering requirementTravel and quarantine | Primary source read | |
| Ex. AGY-ST-TRANSPORT-PORTS-TRANSIT-054 | NCDOT release, Sept. 2, 2021: five Hatteras-route employees positive and isolating for at least 14 days; Hatteras-Ocracoke round trips reduced from 60 to 44 from Sept. 3, 2021 until normal schedules can safely resume; Currituck-Knotts Island suspended Sept. 4-6, 2021; employees and passengers required to wear face coverings inside vessels and terminal facilities regardless of vaccination status per CDC and TSA requirementsNCDOT Reports Five Positive COVID-19 Tests Among Hatteras Ferry Staff | North Carolina Department of Transportation, Ferry Division | North Carolina (Hatteras-Ocracoke route; Currituck-Knotts Island route)State | Sept. 2, 2021 | 2021 Q3 | Context (guidance or announcement)Face-covering requirementTravel and quarantineQuarantine and isolation | Primary source read | |
| Ex. MET-STL-043 | Metro Transit release: Masks Are Still Required for Everyone on Metro TransitMasks required for everyone, vaccinated or not, on MetroBus, MetroLink, Metro Call-A-Ride, at transit centers and on platforms, under the… | Metro Transit (Bi-State Development) | Bi-State Development Agency (Metro Transit), Missouri-IllinoisSector regulator | May 18, 2021 | 2021 Q22021 Q3 | Face-covering requirementTravel and quarantine | Primary source read | |