Any vehicle hauling loose material, except farm produce, as defined in § 55-7-109, shall have affixed, stenciled, or painted on the rear of the vehicle a sign or placard bearing the name of the owner of the vehicle in letters at least six inches (6") in height, clearly visible to a motorist following the vehicle, and an additional identifying number if the owner has more than one (1) such vehicle.
T.C.A. § 55-7-113