We just call it a vehicle inspection here and we do it annually no matter the age. "classic" vehicles that are older than 25 years old fi you get the antique vehicle tags, only need one every 5 years I think but you are also by law limited by what you can use it for usually maintenance or going to events and what not. No matter the age if you have a normal registration you have to get inspected annually but the inspection is a joke, at least in Texas anyway.