Mississippi Code Title 43. Public Welfare § 43-1-35

(1) The amount of the mandatory state supplementary payment in the case of any eligible individual or couple for any month shall be equal to the amount by which such individual's or couple's December 1973 income (as defined in Section 43-1-33) exceeds the amount to which such individual or couple is entitled under Title XVI for such month and the amount of any income of such individual for such month.

(2) If for any month after December 1973 there is a change with respect to any special need or special circumstance as defined in Section 43-1-33(b)(i) which, if such change had existed in December 1973, would have caused a reduction in the amount of such individual's aid or assistance payment; then, for such month and for each month thereafter, the amount of the mandatory minimum state supplementary payment payable to such individual may be reduced by an amount by which the payment would have been reduced by reason of such change.