[bluefinity]

Have you read the commerce clause? It's not very long, so I'll post it here:

> To regulate commerce with foreign nations, and among the several states, and with the Indian tribes;

[refurb]

I was specifically referring to "especially if it's via inspections domestic vehicles don't experience".

But fair point, Commerce Clause also has a less well known international aspect, but court cases have indicated that the states do have some ability to control that trade.