(l.t.r.) Camille Gira, Secretary of State for Sustainable Development and Infrastructure (Luxembourg) ; François Bausch, Minister for Sustainable Development and Infrastructure (Luxembourg)
(l.t.r.) Balz Abplanalp, Counsellor for European Affairs (Switzerland) ; Per-Willy Trudvang Amundsen, State Secretary to the Minister of Local Government and Modernisation (Norway)