Mirrors

Every motor vehicle, other than a trailer, shall be equipped either internally or externally with a mirror so constructed and fitted to the motor vehicle as to assist the driver to become aware of the traffic to the rear of the vehicle: Provided that this regulation shall not apply to a motor vehicle when drawing a trailer if a person is carried on the trailer in a position which affords an uninterrupted view to the rear and such person is provided with efficient means of communicating to the driver the effect of signals given by the drivers of other