(1) Any railway, transportation company, or individual must properly clean and disinfect, under the supervision of an authorized state livestock sanitary official or an official approved by the U.S. Department of Agriculture, any car, truck, or conveyance which has held an animal or poultry infected with an infectious, contagious disease before using such car, truck, or conveyance for the transportation or conveyance of animals into or within the state of Montana.