Miss. Code Ann. § 41-67-15: Miss. Code Ann. § 41-67-15

Nothing in this chapter shall limit the authority of a municipality or board of supervisors to adopt similar ordinances which may be, in whole or in part, more restrictive than this chapter, and in those cases the more restrictive ordinances will govern. The department shall not approve any system that does not comply with an ordinance adopted by a municipality or board of supervisors under the authority of this section.