La. Stat. tit. 33 § 4002
Any municipal corporation may by an ordinance or resolution establish, maintain, and collect rates, charges, or connection charges for the use of and service rendered by the sewerage system to be paid by the owner of each parcel of real estate or building that is connected with or in any way uses or is served by the sewerage system of the municipality, and may re-adjust the rates, charges or connection charges from time to time. Rates or charges or connection charges shall be sufficient in each year for the payment of the proper and reasonable expenses of operation, repairs, replacement, and maintenance of the sewerage system and for the establishment of the necessary sinking fund for the payment of the principal and interest of any revenue producing public utility bonds which may have been issued and sold for the purpose of constructing, acquiring, extending, or improving the sewerage system, and the governing authority of the municipal corporation shall adopt and enforce appropriate rules, regulations, and ordinances and exact penalties, and institute actions at law, for the prompt collection of the respective rates, charges, or connection charges fixed for service rendered by the sewerage system.
La. R.S. § 33:4002