Miss. Code Ann. § 61-9-9

The provisions of this chapter shall be independent of, and in addition to, all existing laws of this state governing the extension or enlargement of municipal corporate boundaries and shall apply to all municipalities, whether any such municipality be operating under the code charter, under the commission form of government, or under a special charter, and regardless of whether a different or special procedure be provided by any such special charter, or by any other laws of the state.