Mississippi Code Title 49. Conservation and Ecology § 49-15-23

(1)(a) The Mississippi Department of Marine Resources and the Commission on Wildlife, Fisheries and Parks are hereby authorized and empowered to establish the dividing line between salt and fresh waters, and when such line has been established and notice thereof given as provided herein, it shall be recognized in the courts in connection with any proceedings under the game and fish laws of this state. Such line may be changed from time to time by the Mississippi Department of Marine Resources and the Commission on Wildlife, Fisheries and Parks on proper publication of such changes.

(b) In establishing the dividing line between salt and fresh waters, no part of the Bay of St. Louis shall be declared to be fresh water.

(c) In establishing the dividing line between salt and fresh waters, none of the waters within the municipal boundaries of the City of Pascagoula, as they existed on January 1, 1981, shall be declared to be fresh water.

(d) In establishing the dividing line between salt and fresh waters, no part of Bayou Cassotte and its tributaries, Bang Bayou and its tributaries, Bayou Cumbest and its tributaries, Crooked Bayou, Middle Bayou and that part of Heron Bayou with its tributaries which lie in the State of Mississippi shall be declared to be fresh water.