Miss. Const. art. 7, § 179

The legislature shall never remit the forfeiture of the franchise of any corporation now existing, nor alter nor amend the charter thereof, nor pass any general or special law for the benefit of such corporation, except upon the condition that such corporation shall thereafter hold its charter and franchises subject to the provisions of this constitution; and the reception by any corporation of any provision of any such laws, or the taking of any benefit or advantage from the same, shall be conclusively held an agreement by such corporation to hold thereafter its charter and franchises under the provisions hereof.