U.S. Centers for Disease Control & Prevention (CDC): Requirement for Face Masks on Public Transportation Conveyances and at Transportation Hubs (applies to airplanes and airports, trains and train stations, subways and subway stations, buses and bus terminals, taxis and pick-up locations, ride-shares and pick-up locations, and other modes of transportation other than private vehicles)
U.S. Centers for Disease Control & Prevention (CDC): Use of Masks to Help Slow the Spread of COVID-19
Autism Services, Education, Resources, and Training (ASERT) Collaborative: Wearing a Mask and Communication (a guide for on how to work with loved ones on getting comfortable wearing a mask)