Mo. Rev. Stat. § 86.193
Current with changes from the 2023 Legislative Session
Should any change or error in records result in any member or beneficiary receiving from the retirement system more or less than he would have been entitled to receive had the records been correct, the board of trustees shall correct such error and, as far as practicable, shall adjust the payments in such a manner that the actuarial equivalent of the benefit to which such member or beneficiary was correctly entitled shall be paid.
§ 86.193, RSMo
RSMo 1939 § 9476, A.L. 1955 p. 275