Okla. Stat. tit. 19, § 863.1

For the purpose of cooperating with the State of Oklahoma in conserving the natural resources of the state, and in promoting the health, safety, peace, morals and general welfare of the people of the state, there may be provided in all applicable counties of the state, city and county planning and zoning, in the manner herein provided, and for that purpose there are hereby created in each of such applicable counties a city-county cooperative planning commission and a county board of adjustment with the respective powers and duties as set out in this act.