(1) On motor vehicles, reflex reflectors must be securely mounted on a rigid part of the vehicle with the plane of the lens perpendicular to the roadway and parallel to the rear axle. Side reflex reflectors must be mounted with the lens face perpendicular to the roadway and parallel to the rear wheels.

(2) On bicycles and motorized foot scooters, the reflectors must be securely mounted and of a type conforming to 16 C.F.R. Part 1512.