Treaties — Power to conclude — European Economic Community — Treaty-making powers of the Community and its Member States — Community possessing power to adopt internal legislation on subject — Parallel power to conclude international agreements — Whether exclusive of powers of Member States — International Labour Organization agreements — Right of Community to participate in these agreements — Health and safety at work — Whether a matter of exclusive Community competence — Express and implied powers to conclude agreements — Mixed agreements

International organizations — International Labour Organization — Participation of European Economic Community in work of the Organization — Community an observer at ILO — Whether Community entitled to become party to ILO conventions — Community decision on procedure to be followed by Member States of Community in the negotiation of ILO conventions

Relationship of international law and municipal law — Treaties — Relationship of European Community law and international law — Capacity of Community to conclude international agreement — Assessment by Court of Justice of the European Communities — Capacity as a matter of Community law distinct from capacity under international law or under constitution of international organization — The law of the European Economic Community