Okla. Stat. tit. 11, § 11-13-105: Preparation of charter

The board of freeholders shall prepare a charter for the

municipality within ninety (90) days after their election. The

charter shall be consistent with and subject to the Oklahoma

Constitution and shall not be in conflict with the Constitution and

laws relating to the exercise of initiative and referendum.

The proposed charter shall be signed in duplicate by at least a

majority of the freeholders. One copy of the proposed charter shall

be given to the mayor and the other shall be given to the county

clerk of the county in which the situs of the municipality is

located.