Following a divorce between an active or retired member and his or her spouse whom the member had designated as a beneficiary, the former spouse shall be treated as having predeceased the member for purposes of the death benefit payment and/or a return of contributions from the deceased member's Teachers' Retirement System account, unless the member has renamed the former spouse as a designated beneficiary. (Note: The beneficiary designation is voided by this section and 15 O.S. § 178, only if the member's designation of beneficiary was signed and dated after November 1, 1987).
Okla. Admin. Code § 715:10-9-7