There is NO law which legislates that you must wear a mask on a plane.
There is a law that grants the TSA authority to issue a regulation requiring you to wear a mask on a plane. Right or wrong, Congress' power to delegate regulatory authority to bureaucrats has been repeatedly affirmed by the courts.
I don't like it, but this is probably correct.
We don't really have laws that represent the people anymore though.
No, there’s not. Show me.
49 U.S.C. 114(l)(2)
(2)Emergency procedures.— (A)In general.— Notwithstanding any other provision of law or executive order (including an executive order requiring a cost-benefit analysis), if the Administrator determines that a regulation or security directive must be issued immediately in order to protect transportation security, the Administrator shall issue the regulation or security directive without providing notice or an opportunity for comment and without prior approval of the Secretary.
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