Ohio Rev. Code Ann. § 3309.73
(A) As used in this section and section 3309.731 of the Revised Code:
(B) A member of the school employees retirement system who has contributions on deposit with a uniform retirement system shall, in computing years of total service, be given full credit for service credit earned under Chapter 742. or 5505. of the Revised Code or purchased or obtained for military service credit if a transfer to the school employees retirement system is made under this division. At the request of the member, the uniform system shall transfer to the school employees retirement system, for each year of service, the sum of the following:
(C) A member who has at least eighteen months of contributing service with the school employees retirement system, is a former member of a uniform retirement system, and has received a refund of contributions to that uniform system shall, in computing years of total service, be given full credit for service credit earned under Chapter 742. or 5505. of the Revised Code or purchased or obtained for military service credit if, for each year of service, the school employees retirement system receives the sum of the following: