Okla. Admin. Code § 715:10-7-5
A retired member receiving a service retirement annuity may not be reinstated to active membership, which was terminated as a result of retirement, nor receive credit for additional membership service, except as provided in OAC 715:10-17-13. Disability retirement may be reinstated under certain conditions (see OAC 715:10-15-21).
Amended at 17 Ok Reg 204, eff 9-8-99 (emergency)
Amended at 17 Ok Reg 3071, eff 7-13-00