The board shall consist of six members who shall be appointed by the governing authorities of Ouachita and Morehouse Parishes for a term of four years and until their successors have been named and qualified, as follows:
One member shall be appointed from a list of three names submitted to the police jury of Ouachita Parish by the Monroe Utilities Commission; one member to be appointed from a list of three names submitted to the Ouachita Parish Police Jury by the town council of the municipality of Sterlington, such persons to be legal residents of the municipality of Sterlington; one member to be appointed by the police jury on its own motion; one member to be appointed from a list of three names submitted to the police jury of Morehouse Parish by the mayor and board of aldermen of the city of Bastrop, Louisiana; one member to be appointed from a list of three names submitted to the police jury of Morehouse Parish by the Bastrop Association of Commerce and Industry; and a sixth member from Morehouse Parish to be appointed by the police jury of Morehouse Parish on its own motion.