Option 1.
An actuarial reduction approved by the board of the member's annuity in reduced monthly payments for life during retirement with the provision that upon the member's death the reduced annuity at date of death shall be continued throughout the life of, and be paid to, the member's spouse; or
Option 2.
The member's normal annuity in regular monthly payments for life during retirement with the provision that upon the member's death a survivor's benefit equal to one-half the member's normal annuity at date of death shall be paid to the member's spouse in regular monthly payments for life; or
Option 3.
An actuarial reduction approved by the board of the member's normal annuity in reduced monthly payments for the member's life with the provision that if the member dies prior to the member's having received one hundred twenty monthly payments of the member's reduced annuity, the member's reduced allowance to which the member would have been entitled had the member lived shall be paid for the remainder of the one hundred twenty-month period to such beneficiary as the member shall have nominated by written designation duly executed and filed with the board. If there is no beneficiary surviving the retiree, the reserve for such allowance for the remainder of such one hundred twenty-month period shall be paid to the retiree's estate; or
Option 4.
An actuarial reduction approved by the board of the member's normal annuity in reduced monthly payments for the member's life with the provision that if the member dies prior to the member having received sixty monthly payments of the member's reduced annuity, the member's reduced allowance to which the member would have been entitled had the member lived shall be paid for the remainder of the sixty-month period to such beneficiary as the member shall have nominated by written designation duly executed and filed with the board. If there is no beneficiary surviving the retiree, the reserve for such allowance for the remainder of such sixty-month period shall be paid to the retiree's estate.
Upon meeting the requirements of subdivision (1) or (2) of this subsection, the monthly benefit payable for the lifetime of the member shall be the actuarial equivalent of the annuity payable pursuant to the provisions of option 1 or option 2 of subsection 3 of this section, as adjusted for early retirement if applicable. In no event shall the monthly benefit payable for the lifetime of the member be greater than the amount that would have been payable to the member under subsection 7 or 8 of section 104.103, whichever is applicable, had the former spouse died on the date of the dissolution of marriage. Any increase in the annuity amount pursuant to this subsection shall be prospective and effective the first of the month following the date of receipt by the system of a certified copy of the dissolution decree that meets the requirements of this subsection.
§ 104.090, RSMo