Section 257.690 - Reflectors, clearance lamps, and side marker lamps; mounting(1) Reflectors shall be mounted at a height not less than 15 inches and not higher than 60 inches above the ground on which the vehicle stands, except that if the highest part of the permanent structure of the vehicle is less than 15 inches, the reflector at such point shall be mounted as high as that part of the permanent structure will permit.(2) The rear reflectors on a pole-trailer may be mounted on each side of the bolster or load.(3) Any required red reflector on the rear of a vehicle may be incorporated with the tail lamp, but such reflector shall meet all the other reflector requirements of this chapter.(4) Clearance lamps shall be mounted on the permanent structure of the vehicle in such a manner as to indicate its extreme width and as near the top thereof as practicable. Clearance lamps and side marker lamps may be mounted in combination if illumination is given as required herein with reference to both.1949, Act 300, Eff. 9/23/1949 ;--Am. 1988, Act 383, Eff. 4/1/1989 .