Yes thanks, I'm aware of how the federal system works. Really in the weeds by now, but it just seems strange to me that each state has not decided, on it's own

Yes thanks, I'm aware of how the federal system works. Really in the weeds by now, but it just seems strange to me that each state has not decided, on it's own (as per the structure of our federal and state system of governance), to make helmets mandatory.