§47-12-204.

§47-12-204.
   
   (a) Every motor vehicle, trailer, semitrailer and pole trailer, and
   any other vehicle which is being drawn at the end of a train of
   vehicles, shall be equipped with at least one tail lamp mounted on the
   rear, which, when lighted as hereinbefore required, shall emit a red
   light plainly visible from a distance of five hundred (500) feet to
   the rear, provided that in the case of a train of vehicles only the
   tail lamp on the rearmost vehicle need actually be seen from the
   distance specified. And further, every such above-mentioned vehicle,
   other than a truck tractor, registered in this state and manufactured
   or assembled after the effective date of this Code, shall be equipped
   with at least two tail lamps mounted on the rear, on the same level
   and as widely spaced laterally as practicable, which, when lighted as
   herein required, shall comply with the provisions of this section.
   
   (b) Every tail lamp upon every vehicle shall be located at a height of
   not more than seventy-two (72) inches nor less than twenty (20)
   inches.
   
   (c) Either a tail lamp or a separate lamp shall be so constructed and
   placed as to illuminate with a white light the rear registration plate
   and render it clearly legible from a distance of fifty (50) feet to
   the rear. Any tail lamp or tail lamps, together with any separate lamp
   for illuminating the rear registration plate, shall be so wired as to
   be lighted whenever the head lamps, clearance lamps or auxiliary
   driving lamps are lighted.