The Academy is an institution for the study and teaching of public and private international law and related subjects. Its purpose is to encourage a thorough and impartial examination of the problems arising from international relations in the field of law. The courses deal with the theoretical and practical aspects of the subject, including legislation and case law. All courses at the Academy are, in principle, published in the language in which they were delivered in the Collected Courses of the Hague Academy of International Law. This volume contains: - Procedure in the European Courts: Comparisons and Proposals by R. PLENDER, Professor at the University of London; - La revision institutionnelle de l'Union europeenne, par M. OREJA AGUIRRE, membre de la Commission europeenne, Bruxelles.