20-125.1. Directional signals.
(a) It shall be unlawful for the owner of any motor vehicle of a changed model or series designation indicating that it was manufactured or assembled after July 1, 1953, to register such vehicle or cause it to be registered in this State, or to obtain, or cause to be obtained in this State registration plates therefor, unless such vehicle is equipped with a mechanical or electrical signal device by which the operator of the vehicle may indicate to the operator of another vehicle, approaching from either the front or rear and within a distance of 200 feet, his intention to turn from a direct line. Such signal device must be of a type approved by the Commissioner of Motor Vehicles.
(b) It shall be unlawful for any dealer to sell or deliver in this State any motor vehicle of a changed model or series designation indicating that it was manufactured or assembled after July 1, 1953, if he knows or has reasonable cause to believe that the purchaser of such vehicle intends to register it or cause it to be registered in this State or to resell it to any other person for registration in and use upon the highways of this State, unless such motor vehicle is equipped with a mechanical or electrical signal device by which the operator of the vehicle may indicate to the operator of another vehicle, approaching from either of the front or rear or within a distance of 200 feet, his intention to turn from a direct line. Such signal device must be of a type approved by the Commissioner of Motor Vehicles: Provided that in the case of any motor vehicle manufactured or assembled after July 1, 1953, the signal device with which such motor vehicle is equipped shall be presumed prima facie to have been approved by the Commissioner of Motor Vehicles. Irrespective of the date of manufacture of any motor vehicle a certificate from the Commissioner of Motor Vehicles to the effect that a particular type of signal device has been approved by his Division shall be admissible in evidence in all the courts of this State.
(c) Trailers satisfying the following conditions are not required to be equipped with a directional signal device:
(1) The trailer and load does not obscure the directional signals of the towing vehicle from the view of a driver approaching from the rear and within a distance of 200 feet;
(2) The gross weight of the trailer and load does not exceed 4,000 pounds.
(d) Nothing in this section shall apply to motorcycles. For purposes of this section, the term "motorcycle" shall not include autocycles. Autocycles shall be subject to the requirements under this section for motor vehicles.