Participating members are not permitted to withdraw any retirement contributions unless the member terminates employment and membership in the System. The Step-Up is binding on future participation in the event that the member elects the Step-Up, and subsequently terminates employment and takes a withdrawal of his or her employee contributions. In the event that such a member returns to employment with a participating employer, he or she must resume participation in the Step-Up. If such a member desires to repay the withdrawal, he or she is required to repay all amounts withdrawn, including any previous Step-Up contributions in order to reinstate the service credit.
Okla. Admin. Code § 590:10-17-6