The Board of Directors comprises a minimum of fifteen members and a maximum of thirty members. Its composition is determined in accordance with article L. 1424-26.
The seats are divided between:
1° The Collectivité européenne d’Alsace;
2° The municipalities and the public establishments for inter-municipal cooperation.
The number of seats allocated to the European Collectivity of Alsace may not be less than three-fifths of the total number of seats, and the number of seats allocated to the municipalities and public establishments for inter-municipal cooperation may not be less than one-fifth of the total number of seats.