20 V.S.A. § 185

The elected officers of political subdivisions shall, immediately after the date that they shall have been appointed and qualified, designate by title, if feasible, or by named person, emergency interim successors and specify their order of succession. The officer shall, each year, review and revise, as necessary, designations made pursuant to this chapter to ensure their current status. The officer shall designate a sufficient number of persons so that, including deputies, there will be not less than three emergency interim successors. Promptly after the designations are made, and after a revision of the designations, copies shall be filed in the office of the county clerk. In the event that any officer of any political subdivision, or his or her deputy provided for pursuant to law, is unavailable, the powers of the office shall be exercised and duties shall be discharged by his or her designated emergency interim successors in the order specified. The emergency interim successors, in the order specified, shall exercise the powers and discharge the duties of the office to which designated until such time as a vacancy that exists is filled in accordance with the Constitution or statutes; or until the officer, or his or her deputy or a preceding emergency interim successor, again becomes available to exercise the powers and discharge the duties of his or her office.