183 Article 21 Jurisdiction The jurisdiction of the Tribunal comprises all disputes and all applications submitted to it in accordance with this Convention and all matters specifically provided for in any other agreement which confers jurisdiction on the Tribunal. Article 22 Reference of disputes subject to other agreements If all the parties to a treaty or convention already in force and concerning the subject-matter covered by this Convention so agree, any disputes concerning the interpretation or application of such treaty or convention may, in accordance with such agreement, be submitted to the Tribunal. Article 23 Applicable law The Tribunal shall decide all disputes and applications in accordance with article 293. SECTION 3. PROCEDURE Article 24 Institution of proceedings 1. Disputes are submitted to the Tribunal, as the case may be, either by notification of a special agreement or by written application, addressed to the Registrar. In either case, the subject of the dispute and the parties shall be indicated. 2. The Registrar shall forthwith notify the special agreement or the application to all concerned. 3. The Registrar shall also notify all States Parties. Article 25 Provisional measures 1. In accordance with article 290, the Tribunal and its Seabed Disputes Chamber shall have the power to prescribe provisional measures. 2. If the Tribunal is not in session or a sufficient number of members is not available to constitute a quorum, the provisional measures shall be prescribed by the chamber of summary procedure formed under article 15, paragraph 3, of this Annex. Notwithstanding article 15, paragraph 4, of this Annex, such provisional measures may be adopted at the request of any party to the dispute. They shall be subject to review and revision by the Tribunal. Article 26 Hearing 1. The hearing shall be under the control of the President or, if he is unable to preside, of the Vice-President. If neither is able to preside, the senior judge present of the Tribunal shall preside.