| Ex. AGY-ST-TRANSPORT-PORTS-TRANSIT-001 | MDOT MTA 'Coronavirus Updates' service-status notice, last updated Mar. 17, 2020 7:00 p.m.: system-wide service reductions effective Mar. 18, 2020; rear-door boarding on all bus routes; Transit Store and Reduced Fare Certification Office closed from Mar. 16Coronavirus Updates - Service Status (service reductions on all vehicle modes effective Wednesday, March 18) | Maryland Department of Transportation, Maryland Transit Administration (MDOT MTA) | Maryland (Baltimore region; MARC Penn, Camden and Brunswick Lines to Washington, D.C. and Martinsburg, W. Va.)State | Mar. 17, 2020 | 2020 Q22020 Q3 | Travel and quarantineCourts and public officesOther | Primary source read | |
| Ex. DC-079 | Mayor's Order 2020-075Phase Two of Washington, DC Reopening | Mayor Muriel Bowser | District of ColumbiaState | June 19, 2020 | 2020 Q22020 Q32020 Q42021 Q12021 Q2 | Business closureTelework mandateCapacity limitGathering capFace-covering requirementSchools and child careHealth care ordersEvents and venuesWorkplace rules | Primary source read | |
| Ex. DC-081 | Mayor's Order 2020-081Requirement to Self-Quarantine After Non-Essential Travel During the COVID-19 Public Health Emergency | Mayor Muriel Bowser | District of ColumbiaState | July 24, 2020 | 2020 Q32020 Q4 | Travel and quarantineQuarantine and isolation | Primary source read | |
| Ex. ECO-C-030 | Mayor's Order 2020-081 (and Mayor's Order 2020-110, Nov. 6, 2020)Requirement to self-quarantine after non-essential travel to high-risk areas during COVID-19 | Mayor Muriel Bowser | District of ColumbiaCity | July 24, 2020 | 2020 Q32020 Q42021 Q1 | Travel and quarantineQuarantine and isolation | Confirmed from a secondary source | |
| Ex. ECO-B-106 | Ballotpedia, 'School responses to the coronavirus (COVID-19) pandemic during the 2020-2021 academic year'State-by-State chronology of 2020-21 reopening orders, statewide closures (Kentucky Nov. 23, 2020; Michigan Nov. 18, 2020), in-person… | Ballotpedia (secondary source; Burbio data) | United States (50 States and D.C.)Other | July 8, 2021 | 2020 Q32020 Q42021 Q12021 Q2 | Schools and child care | Confirmed from a secondary source | |