The Board of Directors comprises a minimum of fifteen members and a maximum of thirty members. Its composition is determined in accordance with the provisions of article L. 1424-26.
The seats are divided between the department on the one hand, and the communes and public establishments for inter-communal cooperation on the other. The number of seats allocated to the département may not be less than three-fifths of the total number of seats, and the number of seats allocated to the communes and public establishments for inter-communal cooperation may not be less than one-fifth of the total number of seats.