| Ex. MET-BOS-093 | MBTA notice: face covering enforcement takes effect November 6, 2020Face Covering Enforcement Takes Effect November 6 (posted November 6, 2020) | MBTA | Massachusetts Bay Transportation AuthoritySector regulator | Nov. 6, 2020 | 2020 Q42021 Q12021 Q22021 Q3 | Face-covering requirementTravel and quarantine | Confirmed from a secondary source | |
| Ex. AGY-AVIATION-SURFACE-057 | MBTA face-covering requirement effective May 6, 2020 (Executive Order for face coverings takes effect)Executive Order for Face Coverings Takes Effect Wednesday, May 6 | Massachusetts Bay Transportation Authority | Massachusetts Bay Transportation Authority (implementing the Governor's Order No. 31)State | May 5, 2020 | 2020 Q22020 Q32020 Q42021 Q12021 Q22021 Q3 | Face-covering requirementTravel and quarantine | Primary source read | |
| Ex. AGY-AVIATION-SURFACE-071 | MBTA notice of Apr. 30, 2021: face coverings continue to be required on MBTA vehicles, stations and platforms for all riders including the fully vaccinated; State civil fines end Apr. 30, 2021, denial of boarding and removal continueReminder: Face Coverings Continue To Be Required on MBTA Vehicles, Stations and Platforms | Massachusetts Bay Transportation Authority | Massachusetts Bay Transportation AuthorityState | Apr. 30, 2021 | 2021 Q22021 Q3 | Context (guidance or announcement)Face-covering requirementTravel and quarantine | Primary source read | |
| Ex. MET-BOS-095 | MBTA reminder: face coverings required on all MBTA vehicles, stations and platforms regardless of vaccination status; refusal grounds for denial of boarding or removalReminder: Face Coverings Are Required on MBTA Vehicles, Stations, Platforms (posted May 14, 2021) | MBTA (applying the CDC conveyance mask order, 86 Fed. Reg. 8025, and TSA security directives) | Massachusetts Bay Transportation AuthoritySector regulator | May 14, 2021 | 2021 Q22021 Q3 | Face-covering requirementTravel and quarantine | Primary source read | |
| Ex. MET-BOS-092 | MBTA face-covering requirement for all customers effective May 6, 2020 (with rear-door boarding and disinfection protocols)Executive Order for Face Coverings Takes Effect Wednesday, May 6 (posted May 5, 2020) | MBTA (implementing COVID-19 Order No. 31) | Massachusetts Bay Transportation AuthoritySector regulator | May 5, 2020 | 2020 Q22020 Q32020 Q42021 Q12021 Q22021 Q3 | Face-covering requirementTravel and quarantine | Primary source read | |