Texas Legalizes Kei Trucks
jalopnik.com
jalopnik.com
In general, accepting random vehicles without proper homologation review by the DOT is an unwise and dangerous process. On the other hand, small and limited use vehicles for explicit use not on public roadways should also be possible.
Kind of like that meme that Kinder eggs were illegal but not AR-style rifles... well, how many people are petitioning and donating money for Kinder egg legality.