Miss. Code Ann. § 73-3-51: Miss. Code Ann. § 73-3-51

It shall be unlawful for the Attorney General or any assistant attorney general, or any district attorney, or any attorney at law associated in the practice as attorney or counselor at law with any attorney general or district attorney, to accept employment from or to represent as attorney or counselor at law any railroad corporation, street railway corporation, telephone or telegraph corporation, express company, or other common carrier, or public service corporation whatsoever, and any attorney violating this section shall be guilty of a misdemeanor and, on conviction, shall be fined in a sum not less than Ten Dollars ($10.00) nor more than One Hundred Dollars ($100.00), and shall forfeit his license to practice law in this state.