Laws generally only exist as a knee-jerk reaction to something. So, if you want to mass import and sell vehicles that don't meet the safety standards you'll ru

Laws generally only exist as a knee-jerk reaction to something. So, if you want to mass import and sell vehicles that don't meet the safety standards you'll run into trouble. But an individual temporarily working in another country bringing a personal/company car for their use with them doesn't. The USA does enforce that you take that vehicle home with you though or at least that's what foreigners tell me when others want cars from their country that aren't sold in the US.