Mo. Rev. Stat. § 104.090
2. In addition, a uniformed member of the highway patrol who is retiring with a normal annuity after attaining normal retirement age shall receive an additional sum of ninety dollars per month as a contribution by the system until such member attains the age of sixty-five years, when such contribution shall cease. To qualify for the contribution provided in this subsection by the system, the retired uniformed member of the highway patrol is made, constituted, appointed and employed by the board as a special consultant on the problems of retirement, aging and other state matters. Such additional contribution shall be reduced each month by such amount earned by the retired uniformed member of the highway patrol in gainful employment. In order to qualify for the additional contribution provided in this subsection, the retired uniformed member of the highway patrol shall have been:
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.
5. Effective July 1, 2000, a member may make an election under option 1 or 2 after the date retirement benefits are initiated if the member makes the election within one year from the date of marriage or July 1, 2000, whichever is later, under any of the following circumstances:
(L. 1955 p. 718 § 18, A.L. 1961 p. 542, A.L. 1969 p. 174, A.L. 1972 S.B. 650, A.L. 1976 H.B. 1211, A.L. 1984 H.B. 1370, A.L. 1986 H.B. 1496, A.L. 1988 H.B. 1643 & 1399, A.L. 1994 H.B. 1149, A.L. 1996 H.B. 1541, A.L. 2000 H.B. 1808, A.L. 2004 H.B. 1440, A.L. 2013 H.B. 233)