Treaties — Effect in municipal law — EEC Treaty, 1957 — Legislation enacted by EEC institutions — Status under municipal law — Directives — Direct effect — Conditions — Failure of Member State to implement provisions of directive by specified time — Whether directive may be relied upon by individuals before municipal courts

International organizations — EEC — Powers — Legislation — Directives enacted by Council — Direct effect — Directive conferring margin of discretion on Member States — Individual provisions imposing precise obligation and capable of having direct effect — Whether severable from other provisions of directive

Relationship of international law and municipal law — Treaties — Effect in municipal law — EEC Treaty, 1957 — Article 189 — Directives — Whether capable of conferring rights on individuals

Economics, trade and finance — Taxation — Value added tax (“VAT”) — Harmonization — Sixth EEC Council Directive 77/388 — Exemptions conferred by directive — Implementation in Member States — Failure of Member State to comply with obligations — Whether individuals may invoke exemptions under directive in case of non-implementation — The law of the European Economic Community