La. Navigation and Shipping § 34:217
For a period of thirty days from the date of the publication of any resolution adopted pursuant to this part, and any statutory law enacted hereunder, any person in interest may contest the legality of the bonds authorized hereunder, after which time no one shall have any cause of action to contest the regularity, formality, legality or effectiveness of such resolution or bonds for any cause whatever, and after which time it shall be conclusively presumed that every legal requirement has been complied with and no court shall have authority to inquire into such matters after the lapse of such thirty days. The newspaper to be used for any such publication shall be a newspaper published in the district, or if no newspaper is published therein, then a newspaper published and having general circulation in Calcasieu Parish.
La. Navigation and Shipping § 34:217