We have permits, issued by the Pennsylvania State Police, and they have a list at the dispatch desk. Name, VIN, DLN, Plates, # of Lights, Color, reason, vehicle info, address, phone #, etc. Never have any problems. People know that the state police don't use just blue lights. They have red, white and blue vector bars or red pancake lights. They also know, here anyway, we don't have local cops. If it isn't a marked car, it's not a cop.