Ohio Rev. Code Ann. § 742.251
(A) A member of the Ohio police and fire pension fund who is not a participant in the deferred retirement option plan established under section 742.43 of the Revised Code, in computing years of active service under division (C) of section 742.37 or section 742.39 of the Revised Code, shall be given full credit for full-time out-of-state or federal service, other than military service, purchased under this section. A member may purchase credit for such service if all of the following conditions are met: