Miss. Code Ann. § 17-5-11

The powers conferred by Sections 17-5-3 through 17-5-11 shall be in addition and supplemental to, and the limitations hereof shall not affect, the powers conferred by any other law; and the powers conferred by Sections 17-5-3 through 17-5-11 are not in substitution for the powers conferred by any other law.