I don't know. My motor home is more than 10 years old, so it has PERMANENT registration. So does my truck.
I have seen "project" vehicles that sat for years without current registration, and when they finally progressed from "project" to "usable", the owner apparently had no trouble getting new license plates.
I rather imagine it is VERY "state specific". Every state will have their own rules.
California, of course, is one of the worst, with its "Non-Op" status. Which, of course, has a fee of its own!