Court of Justice of the European Communities — Procedure — Appeals — Time — limits for — Whether date of bringing appeal is date of posting or date of filing appeal in Registry — Treaty establishing European Coal and Steel Community, Article 33 (3) — Rules of Court, Article 81.

International organization — European Coal and Steel Community — Decisions of High Authority — Distinction between general and individual decisions — Decision amending previous decisions declared illegal by Court of Justice of Community — Whether characterization of amending decision as general or individual depends upon nature of decisions amended — Détournement de pouvoir — Whether decision aimed at injuring certain enterprises — Whether validity of decision affected by possible illegality in method of applying it — Legality of power of High Authority to evaluate amount of scrap purchased by enterprise — Relevance of need for such power to maintain effectiveness of compensation system.