From and after the time such commission is constituted by the cooperating governmental units, it shall have exclusive control for the purposes herein provided over the territory within the jurisdiction of the county to the exclusion of any other planning agency, provided, however, this does not prevent commissioners from contracting with agencies formed in accordance with Chapter 31, Title 74, of the Oklahoma Statutes for planning services and regulation enforcement assistance.
Okla. Stat. tit. 19, § 865.68