Miss. Code Ann. § 73-3-43

It shall not be lawful for a clerk of any court of record or the deputy or assistant of any such clerk, or for any sheriff or his deputy, to exercise the profession or employment of an attorney or counselor at law, or to be engaged in the practice of law, or to receive any fee or reward for any such services rendered during his continuance in such position; and any person offending herein shall be guilty of a misdemeanor, and, upon conviction, to be fined in a sum not exceeding Five Hundred Dollars ($500.00) and be removed from office; but this shall not prohibit the clerk of any court of record or the sheriff of any county from practicing in any of the courts so far as to enable them to bring to conclusion civil cases in which such clerk or sheriff are employed and which are actually filed and pending at the time when such clerk or sheriff is appointed or nominated in a party primary and subsequently elected to office.