La. Stat. tit. 33 § 3961
Any municipality desiring to avail itself of the provisions of this Sub-part may by ordinance of its governing authority create, consolidate or enlarge a sewerage district or districts, and create, consolidate or enlarge sub-district or sub-districts within said districts, irrespective of whether said sub-districts be contiguous or not, for the purpose of purchasing, constructing, improving or maintaining a sewerage system or systems; all ordinances creating, consolidating or enlarging said district or districts, sub-district or sub-districts shall be published for thirty days in a newspaper published in the municipality in which the sewerage district is situated. Four publications in the newspaper for four consecutive weeks shall be considered as published for thirty days, and within thirty days from the date of the first publication any owner of property within the limits of said sewerage district or sub-district shall have the right to appeal to the courts for the purpose of contesting the action of the governing authority of the municipality, after which time such action of said governing authority shall be incontestable for any cause whatsoever, and no court shall be vested with jurisdiction to entertain any cause of action which calls into question the validity or regularity of the action of the governing authority of the municipality in creating, consolidating, or enlarging said district or sub-district.
La. R.S. § 33:3961