The decision of the International Court of Justice in the North Sea Continental Shelf Cases is surely one of the most interesting as well as debatable decisions in the history of the Court. It deals with certain aspects of one of the most important new developments of international law, the doctrine of the Continental Shelf. It also touches on some basic problems of the sources of international law. Among the matters dealt with, in greater or lesser detail, by the Court are the formation of custom in contemporary conditions, the effect of custom upon treaty and, in turn, the possible translation of principles formulated in a multilateral treaty, into universal custom. Above all, the Court was compelled to formulate certain principles of general equity as applicable to the delimitation of the continental shelves between three of the coastal states of the North Sea. It is this attempt of the Court to formulate the general principles of equity applicable to a fair allocation of the resources of the Continental Shelf between neighbors with which the present article will be mainly concerned.