International law in general — Relation to municipal law — Treaties — Interpretation and application of treaty in municipal law Treaty establishing the European Economic Community — The law of England

Treaties — Conclusion and operation of treaties — Operation and enforcement — Necessity for municipal legislation — E.E.C. Treaty — Article 177 — Effect in English law — Reference to European Court of Justice — Whether discretion to refer — European Communities Act 1972, section 3(1)(2) — The law of England