Pennsylvania has allowed YOM plates since 2013, I think Tennessee is more recent but also allow YOM plates. Very simple in Pennsylvania and Tennessee, take a pic of the plate you want to register, send it to the DMV of the appropriate state, they verify the number is unique and the plate is legible and not altered beyond what the plate should look like for the YOM or YOM range, ie. 65 to 70 for my car in Pennsylvania, 66 to 70 for my car in Tennessee. They register the plate to your car. Simply look up Year Of Manufacture license plate on each state to see if they allow it. It seems most states have modeled their law around whoever did it first because states that allow it all have very similar laws around their use. In Pennsylvania and Tennessee, the registration is a lifetime registration which does not require yearly stickers but does not preclude them from being on the plate if the sticker is correct for the YOM. I have my Pennsylvania issued plate and registration card for my 1969 Plymouth Fury on my car and the registration card matches my plate. Nothing crazy or questionable going on here. It is totally legal and the law is designed for just this purpose.
I'm actually surprised you and
@The Goose weren't already aware of this. I thought YOM plate registration was commonly known within automotive circles.