Okla. Stat. tit. 19, § 372

If the board(s) of county commissioners, and the governing body of any city(ies) or town(s) shall enter into any contract as provided in Section 1, then the board(s) of county commissioners and the governing body of any city(ies) or town(s) shall, by resolution, establish a minimum of standards for the operation and equipping of said ambulances and for the qualifications and training of any personnel operating said ambulances within the county(ies). The board(s) of county commissioners and/or governing body of any city(ies) or town(s) shall also have the authority to establish by resolution the minimum charge to be made by any ambulance operator with which it has a contract and to provide for an audit of the books and the records of said operator. Said regulations shall be in compliance with, or exceed, applicable state laws, rules and regulations.