On Friday, February 25th, the TSA announced a change in that it was exercising its discretion. Not that it was recognizing your individual rights to decide for yourself. Here is the update from the TSA website https://www.transportation.gov/safety/mask-travel-guidance

Are school bus operators and their passengers required to wear masks?

No, on February 25, 2022, CDC announced that it is exercising its enforcement discretion to not require that people wear masks on buses or vans operated by public or private school systems, including early care and education/child care programs. CDC is making this change to align with updated guidance that no longer recommends universal indoor mask wearing in K-12 schools and early education settings in areas with a low or medium COVID-19 Community Level. School systems at their discretion may choose to require that people wear masks on buses or vans.