Ohio Rev. Code § 161.06
This section shall be applicable to officers of political subdivisions including, but not limited to, cities, villages, townships, and counties, as well as school, conservancy, and other districts, not included in section 161.01 of the Revised Code. Such officers, subject to such regulations as the executive head of the political subdivision may issue, shall designate by title or by named person, emergency interim successors and specify their order of succession. The officer shall review and revise, as necessary, designations made pursuant to sections 161.01 to 161.29, inclusive, of the Revised Code, to insure their current status. In the event that any officer of any political subdivision, or his deputy provided for pursuant to law, is unavailable, the powers of the office shall be exercised and duties shall be discharged by his designated emergency interim successors in the order specified. The emergency interim successor shall exercise the powers and discharge the duties of the office to which designated until such time as a vacancy which may exist is filled in accordance with the constitution or statutes; or until the officer or his deputy, or a preceding emergency interim successor, again becomes available to exercise the powers and discharge the duties of his office.
R.C. §161.06