Okla. Stat. tit. 19 § 868.15
Prior to the adoption of any zoning regulations, the board of county commissioners shall request the county planning commission to recommend the boundaries of the various districts and appropriate regulations to be enforced therein. The county planning commission shall make a preliminary report of its recommendations for such zoning regulations and shall hold a public hearing thereon for each township to be affected by the proposed regulations. Such hearings may be adjourned from time to time. Within ninety (90) days after the final adjournment of such hearings the county planning commission shall make its final report together with its proposed zoning regulations and a summary of the results of the public hearings to the board of county commissioners. The board of county commissioners may then adopt the proposed regulation or refer it back to the county planning commission for further consideration. If a written protest against the proposed zoning of any land lying within one and one-half (1 1/2) miles of the limits of any municipality having a zoning ordinance is received from the governing body thereof, the board of county commissioners shall not adopt the proposed zoning regulations of such land except by a record vote of all members and after a statement of the reasons for such action shall be spread upon its minutes or records.
Okla. Stat. tit. 19, § 868.15