Court of Justice of the European Communities — Functions Whether it is part of Court's duty to ensure respect for municipal law of member States — Power of Court to interpret or apply constitutional law of member States.

Court of Justice of the European Communities — Costs — Apportionment of — Rules of Procedure, Article 69.

International organization — European Goal and Steel Community — Decisions of High Authority — Violation of substantial procedural requirement — Requirement of reasons for decisions of High Authority — Rationale of this requirement — Decision authorizing trading regulations on basis of criteria as to amount of coal bought and sold by wholesaler — Inadequate reasons for selecting and changing these criteria — Alleged violation of Treaty, Article 65 — Détournement de pouvoir — Use of powers for illegal purpose.