In Massachusetts, which has a stupid law for everything followed by a tax or fee, if you get an antique plate you are limited to driving exclusively in "exhibitions, parades or public events." This would exclude ice cream runs or general Sunday cruising. Now the catch is that no self respecting cop in the world is ever going to give you a hard time about the antique plate so just do it, and even one with no self respect would of course need to prove you were not on your way to or from such an event. However for the small savings I pay for the regular registration and drive all I [censored] well please. My insurance limits me to 2500 miles per year however. Good thing for me the odometer hasn't worked in a decade!