According to its Statute, the jurisdiction of the Court is, in principle, optional. On the other hand, Article 36, paragraph 2, of the Statute, offers States the opportunity of making the jurisdiction compulsory in respect of all or any of the classes of legal disputes affecting: (a) the interpretation of a Treaty; (b) any question of international law; (c) the existence of any fact which, if established, would constitute a breach of an international obligation; (d) the nature or extent of the reparation to be made for the breach of an international obligation. States have only to declare their intention through the special Protocol annexed to the Statute. The undertaking then holds good in respect of any other State which assumes the same obligation. It may be given either unconditionally or on condition of reciprocity on the part of several or certain other States; either permanently or for a fixed period.

So far such compulsory jurisdiction has only been accepted by a small number of countries. The majority of States have abstained because they did not see their way to accept compulsory jurisdiction by the Court in certain cases falling within one or another of the classes of dispute enumerated above, and because they were not sure whether, in accepting, they could make reservations to that effect.

It was for this reason that the Assembly in its resolution of September 6th, requested the First Committee to render more precise the terms of Article 36, paragraph 2, in order to facilitate its acceptance.

Careful consideration of the article has shown that it is sufficiently elastic to allow of all kinds of reservations. Since it is open to the States to accept compulsory jurisdiction by the Court in respect of certain of the classes of dispute mentioned and not to accept it in respect of the rest, it is also open to them only to accept it in respect of a portion of one of those classes; rights need not be exercised in their full extent. In giving the undertaking in question, therefore, States are free to declare that it will not be regarded as operative in those cases in which they consider it to be inadmissible.

We can imagine possible and therefore legitimate, reservations either in connection with a certain class of dispute or, generally speaking, in regard to the precise stage at which the dispute may be laid before the Court. While we cannot here enumerate all the conceivable reservations, it may be worth while to mention merely as examples those to which we referred in the course of our discussions.

From the class of disputes relating to "the interpretation of a treaty" there may be excluded, for example, disputes as to the interpretation of certain specified classes of treaty such as political treaties, peace treaties, etc.

From the class of disputes relating to "any point of international law" there may be excluded, for example, disputes as to the application of a political treaty, a peace treaty, etc., or as to any specified question or disputes which might arise as the outcome of hostilities initiated by one of the signatory States in agreement with the Council or the Assembly of the League of Nations.

Again, there are many possible reservations as to the precise stage at which a dispute may be laid before the Court. The most far-reaching of these would be to make the resort to the Court in connection with every dispute in respect of which its compulsory jurisdiction is recognised contingent upon the establishment of an agreement for submission of the case which, failing agreement between the parties, would be drawn up by the Court itself, the analogy of the provisions of the Hague Convention of 1907 dealing with the Permanent Court of Arbitration being thus followed.

It might also be stated that the recognition of the compulsory jurisdiction of the Court does not prevent the parties to the dispute from agreeing to resort to a preliminary conciliation procedure before the Council of the League of Nations or any other body selected by them, or to submit their disputes to arbitration in preference to going before the Court.