Miss. Code Ann. § 51-7-7: Miss. Code Ann. § 51-7-7

A master water management district may be enlarged in the same manner as provided by law for the organization of such district. The petition shall be filed by the commissioners of the master water management district who shall represent in such petition all water management districts therein.

A master water management district may be reduced in the same manner, by petition signed by its members and publication as provided for by Section 51-7-11 .