Ohio Revised Code General Provisions § 9.44

(A) Except as otherwise provided in this section, a person employed, other than as an elective officer, by the state or any political subdivision of the state, earning vacation credits currently, is entitled to have the employee's prior service with any of these employers counted as service with the state or any political subdivision of the state, for the purpose of computing the amount of the employee's vacation leave.  The anniversary date of employment for the purpose of computing the amount of the employee's vacation leave, unless deferred pursuant to the appropriate law, ordinance, or regulation, is the anniversary date of such prior service.

(B) To determine prior service for the purpose of computing the amount of vacation leave for a person initially employed on or after July 5, 1987, by:

(C) An employee who has retired in accordance with the provisions of any retirement plan offered by the state and who is employed by the state or any political subdivision of the state on or after June 24, 1987, shall not have prior service with the state, any political subdivision of the state, or a regional council of government established in accordance with Chapter 167. of the Revised Code counted for the purpose of computing vacation leave.