Mike Cohee and I qualify for Maryland Historic plates and don't have to fool with it thank God.
In Maryland if the vehicle is over 20 years old and the company is out of business and the model isn't produced anymore, you qualify.
The 25 year applies if the company is still in business (like Ford). I run into people in Maryland all the time who say "Hey! That's not old enough!" because they don't research the law.
So...if you're in Maryland, read-n-heed. :)
Rich