La. Stat. tit. 33 § 4066.3
The governing authority of any individual sewerage system district shall be the governing authority of the parish within which such district is located, unless the governing authority of such parish by a two-thirds vote adopts a resolution appointing a board of supervisors for such individual sewerage system district. The board of supervisors shall consist of five individuals domiciled within the district, each of whom shall be appointed by a majority vote of the governing authority of the parish for a term ending May 1, 1988. Future terms for the members of the board of supervisors shall terminate on May first of each fourth year thereafter. The provisions of R.S. 33:3888 shall be applicable to the members and officers of the board of supervisors.
La. R.S. § 33:4066.3