: I don't believe that the federal gov is compelling any *state* in this
: matter. I believe the federal government has laws which apply directly to
: the manufacturers of boats, just as they do with manufacturers of
: automobiles, for example, mandating certain bumper heights, installation
: of seatbelts, and serial numbers on automobiles. I believe serial numbers
: are required on firearms, too. Similarly, the Coast Guard has laws about
: required lighting, life preserver usage, and right-of-way.

: Congress has a right to establish these laws, just like they have a right to
: pass other laws that affect citizens across the country.

The federal government is a government of enumerated powers. And regulating commerce is certainly among these powers, so NHTSA vehicle regulations and HIN requirements can be imposed by Congress. What Congress can't do is commandeer the states to administer such regulations. If the states do so, it is by choice or in response to inducements. I meant only to respond to George's suggestion that the states don't have a choice in the matter, but rather are compelled to require HINs.