If the member who has completed ten (10) or more years of credited service elects the vested benefit, the member shall be entitled to a monthly retirement annuity commencing on the date the member reaches fifty (50) years of age or the date the member would have had twenty (20) years of credited service had the member's employment continued uninterrupted, whichever is later. The annual amount of such retirement annuity shall be equal to two and one-half percent (2 1/2%) of the annualized final average salary multiplied by the number of years of credited service. For a monthly retirement annuity commencing on or after the effective date of this act, the annual amount of such retirement annuity shall be computed pursuant to the annualized final average salary as defined pursuant to paragraph 17 of Section 50-101 of this title multiplied by the number of years of credited service.
If a terminated member has elected a vested benefit and subsequently returns to work as a police officer of a participating municipality, his or her vested benefit will be set aside and prior credited service will be reinstated.
Okla. Stat. tit. 11, § 50-111.1