MBTA (implementing COVID-19 Order No. 31), MBTA face-covering requirement for all customers effective May 6, 2020 (with rear-door boarding and disinfection protocols) (May 5, 2020) (Ex. MET-BOS-092)
MBTA, MBTA notice: face covering enforcement takes effect November 6, 2020 (Nov. 6, 2020) (Ex. MET-BOS-093)
