Okla. Stat. tit. 19 § 865.58
The commission may adopt the plan or plans, in whole or part, and subsequently amend or extend the adoption plan or portions thereof. Before the adoption, amendment, or extension of the plan or portions thereof, the commission shall hold at least one public hearing thereon. Such hearing may be adjourned from time to time. Prior to said hearing or hearings, the commission shall give reasonable notice in all papers of general circulation in the county, stating time, place and purpose of the hearing, and stating where copies of the proposed plan or plans may be acquired. The adoption of the plan or portions thereof shall be by resolution carried by not less than four (4) members of the commission, including the ex officio member thereof. Before such plan or plans or parts thereof shall have the status of an official plan, it shall be submitted to and shall have the approval of the board of county commissioners. The board may approve the plan in whole or in part, or return the plan or any portion thereof to the commission for further consideration. Any part so approved shall immediately become in full force and effect and as to the area covered by the approved portion of such plan. Should the board fail to act upon such plan within forty-five (45) days from the date of its submission by the commission, such plan shall be deemed to be approved by said board and shall have the status of an official plan or plans for the area. After the adoption of the plan or plans, or part thereof, an attested copy shall be certified by the commission and by the board and shall be certified to the county clerk of such county for safekeeping and as a public record.
Okla. Stat. tit. 19, § 865.58