Indiana Code Title 9. Motor Vehicles § 9-19-6-4

Sec. 4. (a) Except as otherwise provided in this section:

must be equipped with at least one (1) tail lamp mounted on the rear that when lighted as required in this chapter, emits a red light plainly visible from a distance of five hundred (500) feet to the rear.

(b) Only the tail lamp on the rear-most vehicle of a train of vehicles is required to be seen from the distance specified.

(c) Excluding a truck-tractor semitrailer-semitrailer combination equipped with a B-train assembly (as defined in IC 9-13-2-13) governed by section 7 of this chapter, truck-tractor, motorcycle, or motor driven cycle:

that is registered in Indiana and manufactured or assembled after January 1, 1956, must be equipped with at least two (2) tail lamps mounted on the rear that, when lighted, complies with this section.

(d) A tail lamp upon a vehicle shall be located at a height of not less than twenty (20) inches and not more than seventy-two (72) inches.

(e) Either a tail lamp or a separate lamp must be placed and constructed so as to illuminate the rear registration plate with a white light and make the plate clearly legible from a distance of fifty (50) feet to the rear. A tail lamp or tail lamps, together with a separate lamp for illuminating the rear registration plate, must be wired so as to be lighted whenever the head lamps or auxiliary driving lamps are lighted.