(1) The Tribunal shall be the judge of the admissibility of any evidence adduced and of its probative value.
(2) The Tribunal may, if it deems it necessary at any stage of the proceeding:
(a) call upon the parties to produce documents, witnesses and experts; and
(b) visit any place connected with the dispute or conduct inquiries there.
(3) The parties shall cooperate with the Tribunal in the production of the evidence and in the other measures provided for in paragraph (2). The Tribunal shall take formal note of the failure of a party to comply with its obligations under this paragraph and of any reasons given for such failure.
(4) Expenses incurred in producing evidence and in taking other measures in accordance with paragraph (2) shall be deemed to constitute part of the expenses incurred by the parties within the meaning of Article 61(2) of the Convention.
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