This might help some:
The link in post 2 focuses on Ohio. And in the Ohio APR system ...
‘It doesn’t care about expired plates,’ Walczak says.
I think that’s the key weakness. Most illegal immigrants practice identity theft, and using expired plates is an old trick for identity thieves and other criminals.
But if all current plates are on the data base, then expired plates get ‘outed’. While I don’t believe in much federal power, I do think that a national database of all current license plates should be created. Then states would nab them in one fell swoop.
I believe Ohio likes things exactly how they are.