Louisiana constitution
Article 6
Section 43

(1) The legislature by law may grant additional powers and functions to any such commission or district and may create new port commissions or port, harbor, and terminal districts.
(2) Only by law enacted by the favorable vote of two-thirds of the elected members of each house, may the legislature consolidate or abolish any such commission or district or diminish, reduce, or withdraw from any such commission or district any of its powers and functions and affect the structure and organization, distribution, and redistribution of the powers and functions of any such commission or district, including additions to or reductions of its territorial jurisdiction.
(3) The legislature shall enact laws with respect to the membership of the commissions provided in this Section. Once the law with respect to membership is enacted, it may be changed only by law enacted by the favorable vote of two-thirds of the elected members of each house.