The purpose of the association is the operational maintenance of rented historic rolling stock and its operation. To this end, the association can: operate historic steam trains on the networks of the Zentralbahn (zb) and the Berner Oberland Bahnen (BOB); maintain the rented buildings; maintain the rolling stock of the «Ballenberg Dampfbahn Rollmaterial AG» in accordance with the usage lease agreement; execute customer orders; operate a restaurant in the bar car, depot and at special events; be a member of umbrella organizations.