(3) If, within 30 days of receipt of the request for arbitration, any party has not appointed an arbitrator or if within 30 days of the appointment of the arbitrators the parties have not appointed the third arbitrator or, as the case may be, the additional arbitrator, any party to the dispute may request the Chief Justice of the East Caribbean States Supreme Court, or in the event of his non-acceptance for any reason, such other judicial authority as may be prescribed by the Council, to make the required appointment.