La. Roads, Bridges and Ferries § 48:577
The parish governing authority may abolish a district in its entirety or may change or alter the boundaries thereof. However, neither the existence nor the territorial boundaries of any district shall be affected in any manner which would impair any obligations that may have been incurred by it during the period of its existence. A preliminary resolution declaring the intention of the parish governing authority to abolish the district or to alter its boundaries shall be adopted, fixing a date for hearing. Notice of this hearing shall be given as provided in R.S. 48:574 for the formation of a road or sub-road district. A hearing shall be had thereon before any order shall be entered in any manner affecting the existence or territorial limits of any district.
La. Roads, Bridges and Ferries § 48:577