f6ab1d71____Regulations___VLEX_19948537__Mountinglocation
[Number and color] 2 Red(not required on truck tractor) [Mounting height] As near the top as practicable, except where the rear identification lamps are mounted at the extreme height of the vehicle.Practicability of locating lamps on the vehicle header is presumed when the header extends at least 25 mm (1 inch) above the rear doors. [Device activation] Steady burning. [Mountinglocation] 
On the rear to indicate the overall width of the vehicle, at the same height, symmetrically about the vertical centerlineMay be located at a location other than the rear if necessary to indicate the overall width of the vehicle, or for protection from damage during normal operation of the vehicle.
49 CFR 571.108 - Standard No. 108; Lamps, reflective devices, and associated equipment. - Regulations - VLEX 19948537
Mountinglocation