Inspections of hazardous materials shipments

(a) Any shipment or transport of hazardous materials by motor vehicle in commerce of which vehicle placarding or a shipping paper or manifest is required by the hazardous materials regulations adopted by the State, is subject to inspection by persons appointed by the director of transportation to enforce the safe transportation of hazardous materials in commerce and by those state and county officers charged with the enforcement of laws and ordinances adopted pursuant to this part. (b) All carriers and persons that use a highway or street to transport hazardous materials in commerce shall afford the director of transportation, persons designated by the director, and those persons designated by the county executive officers, reasonable opportunity to enter and inspect freight containers, and motor vehicles, to review and document deficiencies on shipping papers and manifests, and to inspect other places incidental to the transshipment of hazardous materials by motor carrier vehicles.