Okla. Stat. tit. 47, § 1149

Service Oklahoma - Duty and authority. It shall be the duty of Service Oklahoma, and Service Oklahoma is hereby granted authority and jurisdiction to administer this act with the aid of its licensed operators, the Department of Public Safety, the Highway Patrol, county sheriffs and all other duly authorized peace officers. Service Oklahoma is hereby authorized to promulgate all necessary rules and prepare forms and records to carry this act into effect and to enforce the provisions thereof. Service Oklahoma shall have the authority in cases of dispute to determine the actual sales price of any vehicle. Service Oklahoma shall periodically cause to be prepared and shall distribute to each authorized licensed operator a manual of procedure containing instructions, directions and guidelines to be followed by all licensed operators in the performance of their duties.