In lieu of the retirement allowance otherwise provided in subdivisions (1) and (2) of this subsection, a member may elect to receive a retirement allowance of:
Option 2.
Upon the member's death the reduced retirement allowance shall be continued throughout the life of and paid to such person as has an insurable interest in the life of the member as the member shall have nominated in the member's election of the option, and provided further that if the person so nominated dies before the retired member, the retirement allowance will be increased to the amount the retired member would be receiving had the retired member elected option 1; or
Option 3.
Upon the death of the member three-fourths of the reduced retirement allowance shall be continued throughout the life of and paid to such person as has an insurable interest in the life of the member and as the member shall have nominated in an election of the option, and provided further that if the person so nominated dies before the retired member, the retirement allowance will be increased to the amount the retired member would be receiving had the member elected option 1; or
Option 4.
Upon the death of the member one-half of the reduced retirement allowance shall be continued throughout the life of, and paid to, such person as has an insurable interest in the life of the member and as the member shall have nominated in an election of the option, and provided further that if the person so nominated dies before the retired member, the retirement allowance shall be increased to the amount the retired member would be receiving had the member elected option 1; or
Option 5.
Upon the death of the member prior to the member having received one hundred twenty monthly payments of the member's reduced allowance, the remainder of the one hundred twenty monthly payments of the reduced allowance shall be paid to such beneficiary as the member shall have nominated in the member's election of the option or in a subsequent nomination. If there is no beneficiary so nominated who survives the member for the remainder of the one hundred twenty monthly payments, the total of the remainder of such one hundred twenty monthly payments shall be paid to the surviving spouse, surviving children in equal shares, surviving parents in equal shares, or estate of the last person, in that order of precedence, to receive a monthly allowance in a lump sum payment. If the total of the one hundred twenty payments paid to the retired individual and the beneficiary of the retired individual is less than the total of the member's accumulated contributions, the difference shall be paid to the beneficiary in a lump sum; or
Option 6.
Upon the death of the member prior to the member having received sixty monthly payments of the member's reduced allowance, the remainder of the sixty monthly payments of the reduced allowance shall be paid to such beneficiary as the member shall have nominated in the member's election of the option or in a subsequent nomination. If there is no beneficiary so nominated who survives the member for the remainder of the sixty monthly payments, the total of the remainder of such sixty monthly payments shall be paid to the surviving spouse, surviving children in equal shares, surviving parents in equal shares, or estate of the last person, in that order of precedence, to receive a monthly allowance in a lump sum payment. If the total of the sixty payments paid to the retired individual and the beneficiary of the retired individual is less than the total of the member's accumulated contributions, the difference shall be paid to the beneficiary in a lump sum.
§ 169.070, RSMo