Mississippi Code Title 21. Municipalities § 21-15-41

(1) No person shall serve in an interim or hold-over capacity for longer than ninety (90) days in a position that is required by law to be filled by appointment of the governing body of a municipality, or by mayoral appointment with the advice and consent of the council or aldermen. If such position is not filled within ninety (90) days after the expiration of the position's term, or within ninety (90) days after the date of appointment if an interim appointment, the hold-over service or interim appointment shall terminate and no municipal funds may thereafter be expended to compensate the person serving in the position. Further, any action or vote taken by such person after the ninety-day period shall be invalid and without effect. If a council or board of aldermen rejects, or otherwise fails to confirm, an individual submitted by the mayor for appointment, the mayor may not resubmit or reappoint the same individual for that position during the remainder of the mayor's current term in office.

(2) It is the intent of the Legislature that the provisions of this section shall apply to all appointees serving in a hold-over or interim capacity on July 1, 2018. For such appointees, the limitation period for serving in a hold-over or interim capacity shall be no longer than ninety (90) days from July 1, 2018.

(3) Any registered voter who resides in the municipality may file all objections to any matters relating to an alleged violation of this section in the chancery court of the county where the municipality is located. The chancery court is authorized to adjudicate and determine relief as may be proper. The court shall award reasonable attorney's fees and costs to the prevailing party.