Relationship of international law and municipal law — Conduct of foreign relations — Treaty-making power — Ireland — Constitution of Ireland — Whether exercise of treaty-making power subject to judicial review — Single European Act 1986 — Compatibility with Irish Constitution

Treaties — Conclusion and operation — Constitutional limitations — Accession of Ireland to Single European Act, 1986 — Extension of powers of European Communities — Compatibility with Irish Constitution — Whether special constitutional amendment required — Obligation for Member States to consult and coordinate in matters of foreign policy — Whether constituting a limitation of sovereignty

International organizations — EEC — Powers — Institutions — Extension of powers by Treaty — Council of the European Communities — Introduction of qualified majority voting — Court of Justice of the European Communities — Effect of decisions in municipal legal order of Member States — Creation of Court of First Instance

Treaties — Effect in municipal law — Priority of treaty provisions over conflicting provisions of municipal law — EEC Treaty, 1957 — Decisions of Council of the European Communities — Primacy of European Community law over contrary municipal law — The law of Ireland