Okla. Stat. tit. 63, § 63-685.6: Interim succession to political subdivision offices

The respective officers of each city or incorporated town, and

of all other political subdivisions, of this state, shall designate

interim successors, and shall specify the order of succession of

deputies and interim successors, in the same manner, and with the

same effect, as is provided for state officers by Section 5 hereof.