The Department shall exempt any vehicle in which hazardous material is transported or any person who transports any hazardous material if such exemption is identical to an exemption issued by the Secretary of the United States Department of Transportation and may exempt any person who transports any hazardous material intrastate under similar provisions. The Department may seek exemptions pursuant to federal law for transportation of those quantities of hazardous materials which do not pose a substantial danger to the public health and safety.
Okla. Stat. tit. 47, § 230.10