Article 153 Arbitration procedure (Const. 32)

1. If a dispute has to be settled by arbitration between member countries, each member country must advise the other party in writing of the subject of the dispute and inform it, by means of a notice to initiate arbitration, that it wishes to initiate arbitration.

2. If the dispute concerns questions of an operational or technical nature, each member country may ask its designated operator to act in accordance with the procedure provided for in the following paragraphs and delegate such power to its operator. The member country concerned shall be informed of the progress of the proceedings and of the result. The respective member countries or designated operators shall hereafter be referred to as "parties to the arbitration".

3. The parties to the arbitration shall appoint either one or three arbitrators.

4. Where the parties to the arbitration choose to appoint three arbitrators, each party shall, in accordance with paragraph 2, select a member country or designated operator not directly involved in the dispute, to act as an arbitrator. When several member countries and/or designated operators make common cause, they shall count only as a single party for the purposes of these provisions.

5. Where the parties agree to the appointment of three arbitrators, the third arbitrator shall be jointly agreed upon by the parties and shall not need to be from a member country or designated operator.

6. If the dispute concerns one of the Agreements, the arbitrators may be appointed only from among the member countries that are parties to that Agreement.

7. The parties to the arbitration may jointly agree to appoint a single arbitrator, who shall not need to be from a member country or designated operator.

8. If one or both parties to the arbitration do not, within a period of three months from the date of the notice to initiate arbitration, appoint an arbitrator or arbitrators the International Bureau shall, if so requested, itself call upon the defaulting member country to appoint an arbitrator, or shall itself appoint one automatically. The International Bureau will not be involved in the deliberations unless otherwise mutually requested by the parties.

9. The parties to the arbitration may mutually agree to reconcile the dispute at any time before a ruling is delivered by the arbitrator or arbitrators. Notice of any withdrawal must be submitted in writing to the International Bureau within 10 days of the parties reaching such agreement. Where the parties agree to withdraw from the arbitration process, the arbitrator or arbitrators shall lose their authority to decide the matter.