In addition to the power and authority granted elsewhere in this Chapter, the board shall have all powers necessary and convenient for carrying out the purposes of the district enumerated in R.S. 33:9252, including the following powers, duties, and responsibilities:
(1) To provide for the maintenance of proper and safe lighting along the interstate highway system and to perform all acts necessary and appropriate to maintain such lighting.
(2) To adopt rules and regulations to implement the purposes of the district as provided in this Chapter.
(3) To contract with public or private entities for maintenance of the lighting along the interstate highway system.
(4) To provide for funding of such lighting maintenance by the parish governing authority and by the governing authorities of the cities of Lake Charles, Sulphur, West Lake, Vinton, and Iowa, all on a pro rata basis as shall be determined by the board.