(1) Unless otherwise agreed by the parties, the arbitral tribunal shall decide whether to hold oral hearings for the presentation of evidence or for oral argument, or whether the proceedings shall be conducted oil the basis of documents and other materials: Provided that the arbitral tribunal shall hold oral hearings, at an appropriate stage of the proceedings, on a request by a party, unless the parties have agreed that no oral hearing shall be held.

(2) The parties shall be given sufficient advance notice of any hearing and of any meeting of the arbitral tribunal for the purposes of inspection of documents, goods or other property.

(3) All statements, documents or other information supplied to, or applications made to, the arbitral tribunal by one party shall be communicated to the other party, and any expert report or evidentiary document on which the arbitral tribunal may rely in making its decision shall be communicated to the parties.