(a) Every motor vehicle, trailer, semi-trailer, and pole trailer, and any other vehicle that is being drawn at the end of a combination of vehicles, shall be equipped with at least two taillamps mounted on the rear, except that one taillamp shall be allowed on any vehicle equipped with only one when it was manufactured.
(b) Either a taillamp or a separate lamp shall be so constructed and placed as to illuminate with a white light all parts of the rear registration number plate on the vehicle so that all the numerals, letters, and marks on the plate are clearly visible and legible for at least 50 feet from the rear of the vehicle.