Okla. Stat. tit. 47, § 2-307.3
A. Prior to January 1, 1991, upon payment to the Oklahoma Law Enforcement Retirement System of the employee contribution the member would have been subject to had the member been a member of the System at the time, plus five percent (5%) interest, any member of the System shall receive credit for not to exceed five (5) years of prior law enforcement service rendered in this state, if the member is not receiving or eligible to receive retirement credit or benefits for such service in any other public retirement system. Effective January 1, 1991, to receive credit for not to exceed five (5) years of prior law enforcement service rendered in this state, if the member is not receiving or eligible to receive retirement credit or benefits for such service in any other public retirement system, the member shall pay the amount determined by the Board pursuant to Section 2-307.5 of this title. Service credit received pursuant to this section shall be used in determining the member's retirement benefit but shall not be used in determining years of service for retirement or vesting purposes.
To receive credit for such service:
B. Upon payment to the Oklahoma Law Enforcement Retirement System of a sum equal to the employee contribution the member would have been subject to had the member been a member of the System at the time, plus five percent (5%) interest prior to January 1, 1991, or effective January 1, 1991, upon payment to the System of the amount determined by the Board pursuant to Section 2-307.5 of this title, any member of the System shall receive credit for not to exceed five (5) years of prior law enforcement service rendered in another state or with a federal law enforcement agency, either as a commissioned law enforcement officer or in a scientific or technical field, if the member is not receiving or eligible to receive retirement credit or benefits for such service in any other public retirement system. Service credit received pursuant to this section shall be used in determining the member's retirement benefit but shall not be used in determining years of service for retirement or vesting purposes.
To receive credit for such service:
C. Such service credit may be paid by:
Laws 1987, HB 1473, c. 236, § 164, emerg. eff. July 20, 1987; Amended by Laws 1988, HB 1588, c. 267, § 25, eff. July 1, 1988; Amended by Laws 1990, SB 810, c. 340, § 24, emerg. eff. July 1, 1990; Amended by Laws 1990, HB 1880, c. 334, § 5, emerg. eff. July 1, 1990; Amended by Laws 2003, HB 1647, c. 406, § 10, emerg. eff. July 1, 2003 (superseded document available); Amended by Laws 2006, 2nd Extr. Sess., HB 1179, c. 46, § 25, emerg. eff. July 1, 2006 (superseded document available); Amended by Laws 2016, SB 1040, c. 8, § 4, emerg. eff. April 5, 2016 (superseded document available)