Mo. Rev. Stat. § 104.378

104.378. Survivors as special consultants on board, when, compensation. — Upon the death of a member who has not requested creditable prior service pursuant to subsection 4 of section 104.372 , the survivor of such member who is or would be eligible to receive benefits pursuant to section 104.420 may apply to the board of trustees and shall be made, constituted, appointed and employed by the board as a special consultant on the problems of retirement, aging and other state matters for the remainder of the surviving spouse's life, and upon request of the board shall give opinions, and be available to give opinions in writing, or orally, in response to such requests. As compensation for such services, such survivor may elect to have the member receive such creditable prior service. Upon making such election, all of the provisions of subsection 4 of section 104.372 shall apply. Any survivor benefits payable shall be calculated as if such creditable prior service had been received by such member on the date of the death of the member.

(L. 1999 S.B. 308 & 314)