City of Hillsdale issued the following announcement on Aug 4.
Dial-A-Ride Transportation (DART) is reminding riders to continue wearing masks by order of the Transportation Security Administration (TDA), which has mandated the face mask requirement through Sept. 13 for all over-the-road buses and commuter bus systems.
The TSA’s federal mask requirement seeks to minimize the spread of COVID-19 on public transportation, and DART remains dedicated to protecting the health and safety of its riders and employees.
Original source can be found here.