Okla. Stat. tit. 47, § 2-305.4
Notwithstanding any other provision contained herein to the contrary, the benefits payable to a member in the System shall be subject to the limitations of Section 415 of the Internal Revenue Code of 1986 in accordance with the provisions of paragraphs 1 and 2 of this section.
1. Except as provided in subparagraphs c through g of this paragraph, any accrued retirement benefit payable to a member shall not exceed the lesser of:
b. one hundred percent (100%) of the average earnings of the member for the three (3) consecutive calendar years, while a member in the System, in which the members earnings were the highest. For purposes of this subparagraph, earnings for any limitation year shall be the earned income of the member, wages, salaries, and fees for professional services, and other amounts received for personal services actually rendered in the course of employment with a participating employer, provided such amounts are actually paid or includable in gross income during such year. Earnings shall exclude the following:
2. If a member also participates, or has participated, in one or more defined contribution plans, within the meaning of Section 415(k) of the Internal Revenue Code of 1986, maintained by a participating employer, the sum of the defined benefit plan fraction and defined contribution plan fraction, as defined in (1) and (2) below, shall not exceed one. If, in any limitation year, the sum of the defined benefit plan fraction and the defined contribution plan fraction for a member would exceed one without adjustment of the amount of the maximum annual accrued retirement benefit that can be paid to such member pursuant to paragraph 1 of this section, the amount of the maximum annual accrued retirement benefit that can be paid to such member pursuant to paragraph 1 of this section shall be reduced to the extent necessary to reduce the sum of the defined benefit plan fraction and the defined contribution plan fraction for the member to one, or the Board may take such other action as will cause the sum to equal one or less. As used in this paragraph:
a. "Defined benefit fraction" means a fraction:
b. "Defined contribution fraction" means a fraction:
(2) the denominator of which is the sum of the lesser of one hundred twenty-five percent (125%) of the dollar limitation under Section 415(c)(1)(A) of the Internal Revenue Code of 1986 or one hundred forty percent (140%) of the percentage limitation under Section 415(c)(1)(B) of the Internal Revenue Code of 1986, for such limitation year and for all prior limitation years during which the member was employed by an eligible employer. At the option of the Board, the denominator may be increased by using for limitation years ending prior to January 1, 1983, an amount equal to the denominator in effect for the limitation year ending in 1982, multiplied by the transition fraction provided in Section 415(e)(6)(B) of the Internal Revenue Code of 1986.
The Board is hereby authorized to make the special election under Internal Revenue Code Section 415(b)(10). If this special election is made, the Section 415 limit for a member who joined the System prior to January 1, 1990 shall be the greater of: (1) the applicable Code Section 415 limit, or (2) the member's benefit under the System without regard to any benefit increases pursuant to a System amendment adopted after October 14, 1987.
In the event that the special election is made, subparagraph f of paragraph 1 of this section shall read as follows: f. The limitations specified in this section shall apply to a straight life annuity with no ancillary benefits and to an annuity that constitutes a qualified joint and survivor annuity, provided payment begins at the age at which the member could receive an unreduced primary insurance amount under the federal Social Security laws (i.e., "social security retirement age") determined by disregarding the age increase factor thereunder and as if early retirement were sixty-two (62). If payment is in a different form, the amount thereof shall be adjusted to be the actuarial equivalent of a single life annuity and the limitations shall be applied to such adjusted amount. Such adjustment shall be based on the actuarial tables adopted by the Board. If payment begins before the member's social security retirement age, the limitation in subparagraph a of this paragraph shall be reduced by applying a reduction factor consistent with social security reduction factors, as prescribed by the Secretary of the Treasury; provided, however, that in no event shall such amount be reduced below Fifty Thousand Dollars ($50,000.00), adjusted for increases in the cost of living, as prescribed by the Secretary of the Treasury, or his delegate. If payment begins after the participant's social security retirement age, the limitation in subparagraph a of this paragraph shall be the actuarial equivalent of such amount otherwise applicable at the member's social security retirement age, based on the actuarial tables adopted by the Board. The interest rate to be used in determining such actuarial equivalent amount shall be the rate specified in the actuarial tables adopted by the Board; however, the interest rate used in determining an actuarially equivalent single life amount shall not be less than five percent (5%) and the interest rate used in determining an actuarially equivalent post-social-security-retirement-age amount shall not be greater than five percent (5%).
The Board is hereby authorized to do all acts and things necessary and proper to carry out the purpose of the System and to make the least costly amendments and changes, if any, as may be necessary to qualify the System under the applicable sections of the Internal Revenue Code of 1986, as amended.
Laws 1991, HB 2176, c. 323, § 5, emerg. eff. June 12, 1991.