Okla. Stat. tit. 47, § 2-308
A. A member who terminates his service before normal retirement date, other than by death or disability, shall, upon application filed with the Board, be entitled to be refunded from the fund an amount equal to the accumulated contributions the member has made to the fund, but excluding any interest or any amount contributed by the state. If such member has completed ten (10) years of credited service at the date of termination, the member may elect a vested benefit in lieu of receiving his accumulated contributions.
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 member's normal retirement date to be determined as if the member's employment continued uninterrupted. The annual amount of such retirement annuity shall be equal to two and one-half percent (2 1/2%) of final average salary multiplied by the number of years of credited service. The death benefits provided for under Section 2-306 of this title shall apply to any member retiring under the provisions of this subsection.
Laws 1961, HB 556, p. 335, § 2-308, eff. September 1, 1961; Amended by Laws 1975, HB 1595, c. 365, § 6, emerg. eff. July 1, 1975; Amended by Laws 1978, HB 1740, c. 310, § 2, emerg. eff. May 11, 1978; Amended by Laws 1980, SB 266, c. 357, § 14, emerg. eff. July 1, 1980; Amended by Laws 1982, HB 1850, c. 328, § 6, emerg. eff. July 1, 1982; Amended by Laws 2002, HB 2311, c. 399, § 6, emerg. eff. July 1, 2002 (superseded document available).