1. Whenever the construction of a convention to which States other than those concerned in the case are parties may be in question within the meaning of Article 63, paragraph 1, of the Statute, the Court shall consider what directions shall be given to the Registrar in the matter.
2. Whenever the construction of a convention to which a public international organization is a party may be in question in a case before the Court, the Court shall consider whether the Registrar shall so notify the public international organization concerned. Every public international organization notified by the Registrar may submit its observations on the particular provisions of the convention the construction of which is in question in the case.
3. If a public international organization sees fit to furnish its observations under paragraph 2 of this Article, the procedure to be followed shall be that provided for in Article 69, paragraph 2, of these Rules.
Article 52*1 2
1. The original of every pleading shall be signed by the agent and filed in the Registry. It shall be accompanied by a certified copy of the pleading, documents annexed, and any translations, for communication to the other party in accordance with Article 43, paragraph 4, of the Statute, and by the number of additional copies required by the Registry, but without prejudice to an increase in that number should the need arise later.
2. All pleadings shall be dated. When a pleading has to be filed by a certain date, it is the date of the receipt of the pleading in the Registry which will be regarded by the Court as the material date.
3. The correction of a slip or error in any document which has been filed may be made at any time with the consent of the other party or by leave of the President. Any correction so effected shall be notified to the other party in the same manner as the pleading to which it relates.
Subsection 2. Preliminary Objections
Article 79* 1
1. Any objection by the respondent to the jurisdiction of the Court or to the admissibility of the application, or other objection the decision upon which is requested before any further proceedings on the merits, shall be made in writing as soon as possible, and not later than three months after the delivery of the Memorial. Any such objection made by a party other than the respondent shall be filed within the time-limit fixed for the delivery of that party's first pleading.
2. Notwithstanding paragraph 1 above, following the submission of the application and after the President has met and consulted with the parties, the Court may decide that any questions of jurisdiction and admissibility shall be determined separately.
3. Where the Court so decides, the parties shall submit any pleadings as to jurisdiction and admissibility within the time-limits fixed by the Court and in the order determined by it, notwithstanding Article 45, paragraph 1.
4. The preliminary objection shall set out the facts and the law on which the objection is based, the submissions and a list of the documents in support; it shall mention any evidence which the party may desire to produce. Copies of the supporting documents shall be attached.
5. Upon receipt by the Registry of a preliminary objection, the proceedings on the merits shall be suspended and the Court, or the President if the Court is not sitting, shall fix the time-limit within which the other party may present a written statement of its observations and submissions; documents in support shall be attached and evidence which it is proposed to produce shall be mentioned.
6. Unless otherwise decided by the Court, the further proceedings shall be oral.
7. The statements of facts and law in the pleadings referred to in paragraphs 4 and 5 of this Article, and the statements and evidence presented at the hearings contemplated by paragraph 6, shall be confined to those matters that are relevant to the objection.
8. In order to enable the Court to determine its jurisdiction at the preliminary stage of the proceedings, the Court, whenever necessary, may request the parties to argue all questions of law and fact, and to adduce all evidence, which bear on the issue.
9. After hearing the parties, the Court shall give its decision in the form of a judgment, by which it shall either uphold the objection, reject it, or declare that the objection does not possess, in the circumstances of the case, an exclusively preliminary character. If the Court rejects the objection or declares that it does not possess an exclusively preliminary character, it shall fix time-limits for the further proceedings.
10. Any agreement between the parties that an objection submitted under paragraph 1 of this Article be heard and determined within the framework of the merits shall be given effect by the Court.
Subsection 3. Counter-Claims
Article 80* 1
1. The Court may entertain a counter-claim only if it comes within the jurisdiction of the Court and is directly connected with the subject-matter of the claim of the other party.
2. A counter-claim shall be made in the Counter-Memorial and shall appear as part of the submissions contained therein. The right of the other party to present its views in writing on the counter-claim, in an additional pleading, shall be preserved, irrespective of any decision of the Court, in accordance with Article 45, paragraph 2, of these Rules, concerning the filing of further written pleadings.3. Where an objection is raised concerning the application of paragraph 1 or whenever the Court deems necessary, the Court shall take its decision thereon after hearing the parties.