Nowhere does that even suggest that Mexicans have to return to Mexico within 24 hours if they drive here from Mexico. That's just not a law. I have no idea why you think Mexicans can't legally drive from Tijuana to New York City, but they can, despite that taking over 40 hours.
They can even drive to Toronto. That would take even longer. And then they can go back through Canada and through the U.S. and back to Mexico and they can stay in the U.S. as long as their travel visa allows.
I have no idea why you think they can only get 12 hours from Mexico by car before they have to turn back.
read it, it's right there in the law: the car has to be qualified by american import restrictions and standards; which these cars do not have and will never get.
the only way to legally drive is it is to return it to a garage out of state and all of the states have similar laws.
i think you're purposely missing the point; there is no such thing as 24 hour car registration and you cannot register a car unless it's garaged in the jurisdiction to intend to keep driving it in.
any car owner knows this so you're clearly no longer arguing in good faith and i don't see a reason to continue.