Section 20: Hearings and written proceedings.

(1) Subject to any contrary agreement by the parties, the arbitral tribunal shall decide whether the arbitral proceedings shall be conducted-
(a) by holding oral hearings for the presentation of evidence or oral arguments; or
(b) on the basis of document or other materials; or
(c) by both holding oral hearings and on the basis of documents or other materials as provided in paragraphs (a) and (b) of this subsection,
and unless the parties have agreed that no hearing shall be held, the arbitral tribunal shall hold such hearings at an appropriate stage of the proceedings if requested so to do by any of the parties.
(2) The arbitral tribunal shall give to the parties sufficient advance notice of any hearing and of any meeting of the arbitral tribunal held for the purposes of inspection of documents, goods, or other property.
(3) Every statement, document or other information supplied to the arbitral tribunal shall be communicated to the other party by the party supplying the statement, document or other information, and every such statement, document or other information supplied by the arbitral tribunal to one party shall be supplied to the other party.
(4) Any expert report or evidentiary document on which the arbitral tribunal may rely in making its decision shall be communicated to the parties.
(5) The arbitral tribunal shall, unless otherwise agreed by the parties, have power to administer oaths to or take the affirmations of the parties and witnesses appearing.
(6) Any party to an arbitral proceedings may, issue out a writ of subpoena ad testificandum or subpoena duces tecum, but no person shall be compelled under any such writ to produce any document which he could not be compelled to produce on the trial of an action.