(2) Supporting documentation shall ordinarily be filed together with the instrument to which it relates, and in any case within the time limit fixed for the filing of such instrument.

(1) The hearings of the Commission shall take place in private and, except as the parties otherwise agree, shall remain secret.

(2) The Commission shall decide, with the consent of the parties, which other persons besides the parties, their agents, counsel and advocates, witnesses and experts during their testimony, and officers of the Commission may attend the hearings.

(1) Each party may, at any stage of the proceeding, request that the Commission hear the witnesses and experts whose evidence the party considers relevant. The Commission shall fix a time limit within which such hearing shall take place.

(2) Witnesses and experts shall, as a rule, be examined before the Commission by the parties under the control of its President. Questions may also be put to them by any member of the Commission.

(3) If a witness or expert is unable to appear before it, the Commission, in agreement with the parties, may make appropriate arrangements for the evidence to be given in a written deposition or to be taken by examination elsewhere. The parties may participate in any such examination.

(1) Any objection that the dispute is not within the jurisdiction of the Centre or, for other reasons, is not within the competence of the Commission shall be made as early as possible. A party shall file the objection with the Secretary-General no later than in its first written statement or at the first hearing if that occurs earlier, unless the facts on which the objection is based are unknown to the party at that time.

	105