Participation in the Step-Up can be effective as early as the first payroll period following January 1, 2004, provided that the member has signed and filed the election form with his or her Retirement Coordinator prior to that date. After January 1, 2004, the election can be made at enrollment or at any time while participating as an active member. The Step-Up will be effective the first payroll period following the member's election and acceptance of the election by the member's participating employer.
Okla. Admin. Code § 590:10-17-4