(a) General rule.--All implements of husbandry, commercial implements of husbandry and special mobile equipment designed to operate at 25 miles per hour or less and all animal-drawn vehicles shall, when traveling on a highway, display on the rear of the vehicle a reflective slow moving vehicle emblem as specified in regulations of the department. The use of the slow moving vehicle emblem shall be in addition to any other lighting devices or equipment required by this title.

(b) Limitations on use or display.--No person shall use or display the slow moving vehicle emblem except as provided in this section nor shall any person display the emblem on a vehicle traveling at a speed in excess of 25 miles per hour.

(c) Towed vehicles.--The emblem shall be required to be displayed on a slow moving vehicle which is being towed on a highway unless the towing vehicle displays the emblem in such a manner as to be clearly visible from the rear.