وفي رأيه أن مفهوم المشروعية يختلف، من حيث الدرجة، من قاعدة إلى أخرى ومن زمن إلى آخر.
The General Assembly, by resolution 478 (v) invited the Commission, in the course of its work on the codification of the law of treaties, to study the question of reservations to multilateral conventions in general, both from the point of view of codification and from that of the progressive development of international law, and to report to the Assembly at its sixth session, in 1951.