Ganshof Van Der Meersch, Walter Keywords: European Communities | Community law and municipal law | Mots clefs: Communautés européennes | Droit communautaire et droit interne | ABSTRACT Walter Ganshof van der Meersch begins his main course on the relations between the legal order of European Communities and international law through a presentation of the inter-state organization of institutional rules. He presents the constitutional rules of international organizations, including the special nature of the Community legal o…