La. Stat. tit. 33 § 3963
The governing authority of the municipality creating said districts or sub-districts shall appoint a board of sewerage commissioners to consist of five members, all residents of the district or sub-district owning property to be served by the sewerage improvements and authorized to vote under the laws of Louisiana in the municipality in which the district or sub-district is located. Said board, subject to the supervision of the governing authorities of the municipality, shall manage the affairs of the district and let all contracts for the construction, maintenance, improvement and operation of the said district or sub-district; said commissioners shall hold office for a term of four years and until their successors have been appointed by the governing authority of the municipality in which their district or sub-district is located. The governing authority of any sewerage district shall likewise be the governing authority of any sub-district located in said district.
La. R.S. § 33:3963