New Jersey Statutes Title 39. Motor Vehicles and Traffic Regulation 39 § 4-102

If a physician's motor vehicle is stopped for exceeding the speed limit while in the act of responding to an emergency call, the registration number of the vehicle and the driver's license number may be inspected and noted and the physician shall then be allowed to proceed in the vehicle to his destination. Such proceedings may be taken subsequently as would have been proper had the person not been a physician.