La. Stat. tit. 38 § 1756
Whenever gravity drainage districts or gravity sub-drainage districts are created or reorganized under the provisions of this Part, or lands have been added to a gravity drainage district or gravity sub-drainage district, as provided in R.S. 38:1799, a copy of the ordinance or ordinances of the police jury or police juries, duly certified to by the secretary, shall be published for thirty days in a newspaper published in the parish, or parishes in which the lands embraced in the gravity drainage or sub-drainage district lie, or if there is no newspaper published therein, the publication shall be made in a newspaper published in an adjoining parish and by posting in three public places in the district or sub-district, four publications in the newspaper once a week constituting publication for thirty days.
La. R.S. § 38:1756