Okla. Stat. tit. 18 § 381.61
Pursuant to a plan agreed upon by at least two-thirds of the members of the board of directors as being equitable to the members or stockholders of the association and as not impairing other associations, foreign associations, and federal associations, an association may merge or consolidate with another association, foreign association, or federal association, provided that the plan of such merger or consolidation shall be approved at an annual meeting or at any special meeting of the members or stockholders called to consider such action by a majority vote of the outstanding stock entitled to vote thereon or upon a majority vote of the total number of votes of the members present in person or by proxy. An application to merge or consolidate shall be filed with the State Banking Commissioner and the same shall be the subject of an individual proceeding pursuant to Article II of the Administrative Procedures Act, Section 309 et seq. of Title 75 of the Oklahoma Statutes. If the merger or consolidation is approved by the Commissioner, a copy of the order of approval shall be filed with the Secretary of State who shall then issue a certificate of merger. In all cases of merger or consolidation, the corporate continuity of the resulting corporation shall have the same incidents, rights and liabilities as that of an association which has converted pursuant to this act. The Commissioner may provide, by rule, for any additional procedure to be followed, and application fee to be paid, by any associations merging or consolidating pursuant to this act.
Okla. Stat. tit. 18, § 381.61