FWIW....I applied for a set of plates in December of last year. Got a LOT of grief from the knuckle draggers at the DMV......they said that my Porsche did not meet the description of a Historical Vehicle.
The three requirements were.....
1) 25 years old
2) made AFTER 1922
3) Is of Historical Interest
The first two weren't too hard, even the 1/2 wits there could figure it out. But number three stumped them.
Waaahhhhl, I don't think a Peooorshuh is of any interest to us here at DMV......hyuk..........
I told them that it was to me....take my money and submit my application. 45 days later I got them.
Neat little tidbit.....if a CA car has Historical Plates it looks like that they are smog exempt even if they are NOT pre 73...one other thing. There is no description of a "Historical Vehicle". So it could be a 25 year YUGO as far the rules go.