La. Stat. tit. 3 § 1209
The supervisors of any district shall have authority to formulate regulations governing the use of lands within the district in the interest of conserving soil and soil resources and preventing and controlling soil erosion. The supervisors may conduct such public meetings and public hearings upon tentative regulations as may be necessary to assist them in this work. The supervisors shall not have authority to enact such land-use regulations into law until after they shall have caused due notice to be given of their intention to conduct a referendum for submission of such regulations to the owners of land within the district, for their indication of approval or disapproval of such proposed regulations, and until after the supervisors have considered the results of such referendum. The proposed regulations shall be embodied in a proposed ordinance. Copies of such proposed ordinance shall be available for the inspection of all eligible voters during the period between publication of such notice and the date of the referendum. The notices of the referendum shall recite the contents of such proposed ordinance, or shall state where copies of such proposed ordinance may be examined. The question shall be submitted by ballots, upon which shall appear the words: "For the approval of proposed ordinance No.__, prescribing land-use regulations for conservation of soil and prevention of erosion", and "Against the approval of proposed ordinance No.__, prescribing land-use regulations for conservation of soil and prevention of erosion", with a square before each proposition and a direction to insert an X mark in the square before one or the other of said propositions as the voter may favor or oppose approval of such proposed ordinance. The supervisors shall supervise such referendum, shall prescribe appropriate regulations governing the conduct thereof, and shall publish the results thereof. All owners of land within such district shall be eligible to vote in such referendum. Only such land owners shall be eligible to vote. No informalities in the conduct of such referendum or in any matters relating thereto shall invalidate said referendum or the result thereof if notice thereof shall have been given substantially as herein provided and said referendum shall have been fairly conducted.
The supervisors shall not have authority to enact such proposed ordinance into law unless at least a two-thirds majority of the votes cast in such referendum shall have been cast for approval of the said proposed ordinance. The approval of the proposed ordinance by a two-thirds majority of the votes cast in such referendum shall not be deemed to require the supervisors to enact such proposed ordinance into law. Land-use regulations prescribed in ordinances adopted pursuant to the provisions of this Section by the supervisors of any district shall have the force and effect of law in the said district and shall be binding and obligatory upon all owners of lands within such districts.
Any owner of land within such district may at any time file a petition with the supervisors asking that any or all of the land-use regulations prescribed in any ordinance adopted by the supervisors under the provisions of this Section shall be amended, supplemented, or repealed. Land-use regulations prescribed in any ordinance adopted pursuant to the provisions of this Section shall not be amended, supplemented, or repealed except in accordance with the procedure prescribed in this Section for adoption of land-use regulations. Referenda on adoption, amendment, supplementation, or repeal of land-use regulations shall not be held more often than once in six months.
The regulations to be adopted by the supervisors under the provisions of this Section may include:
The regulations shall be uniform throughout the territory comprised within the district, except that the supervisors may classify the lands within the district with reference to such factors as soil type, degree of slope, degree of erosion threatened or existing, cropping or tillage practices in use, and other relevant factors, and may provide regulations varying with the type or class of land affected, but uniform as to all lands within each class or type. Copies of land-use regulations adopted under the provisions of this Section shall be printed and made available to all owners and occupants of lands lying within the district.
La. R.S. § 3:1209