Mo. Rev. Stat. § 104.260

104.260. Members retiring after October 1, 1984, may be made consultants, when, procedure — compensation to be exempt from taxes, judgments, claims — unassignability. — 1. Any member who retired prior to October 1, 1984, and who elected at that time to take the option of a reduced benefit during his life and a survivor's benefit for his spouse after his death shall, upon application, be made consultant on the problems of retirement, aging, and maintaining a spouse on reduced benefit, and upon the request of the board, shall give opinions and be available to give opinions, in writing or orally, in response to such requests by the board. As compensation for the services required by this section, such person shall be compensated in an amount which, when added to the benefits received by him, is equal to the amount he would have received had he retired on the date of his application to be made a consultant under the provisions of this section and had elected the option of his choice pursuant to the provisions of subsection 3 of section 104.090 .

2. The employment provided for by this section shall in no way affect any person's eligibility for retirement or survivor benefits under this chapter, or in any way have the effect of reducing any retirement or survivor benefits, anything to the contrary notwithstanding.

3. The compensation provided for in this section shall be treated as any other state retirement benefits, payable by the transportation department employees' and highway patrol retirement system and are exempt from any tax of any political subdivision of the state, and shall not be subject to execution, garnishment, attachment, writ of sequestration, or any other process or claim whatsoever, and shall be unassignable, anything to the contrary notwithstanding.

(L. 1987 H.B. 713, A.L. 1992 S.B. 499, et al.)