Miss. Code Ann. § 25-11-319: Miss. Code Ann. § 25-11-319

(1) The right of a person to an annuity, a retirement allowance or benefit, or to the return of contributions, or to any optional benefit or any other right accrued or accruing to any person under the provisions of the Supplemental Legislative Retirement Plan, and the monies in the plan created by this article, are exempt from any state or municipal tax, and exempt from levy and sale, garnishment, attachment or any other process whatsoever, and shall be unassignable except as specifically otherwise provided in this article.

(2) Any retired member or beneficiary receiving a retirement allowance or benefit under this article may authorize the system to make deductions from the retirement allowance or benefit for the payment of employer or system sponsored group life or health insurance. The deductions authorized under this subsection shall be subject to rules and regulations adopted by the board.