The Contracting Authority is Vest-Agder county municipality, DDV Drift with the municipalities of Mandal, Marnardal, Audnedal, Åseral, Hægebostad, Lindesnes, Farsund, Kvinesdal and Flekkefjord municipalities and DDØ with the municipalities of Risør, Vegårshei, Tvedestrand, Åmli and Gjerstad.