I am waiting for someone to claim it is unconstitutional.
Perhaps you can explain how it is Constitutional? Keep in mind the seatbelt laws are based on extortion, which must be addressed. Yes, the word extortion is properly used, because the matter was not left up to the States, or as originally promised-to the people, as claimed in the original engineering mandate to the automakers. See, the feds use income tax money for the express purpose of forcing States to comply with their mandate.
Where's the clause giving Congress the authority to do this, or to delegate it?