(a) The Tribunal may, at the preparatory conference or at a later stage, and after consultation with the parties, appoint one or more independent experts to report to it on specific issues designated by the Tribunal. A copy of the expert's terms of reference, established by the Tribunal, having regard to any observations of the parties, shall be communicated to the parties. Any such expert shall be required to sign an appropriate confidentiality undertaking. The terms of reference shall include a requirement that the expert report to the Tribunal within 30 days of receipt of the terms of reference.
(b) Subject to Article 48, upon receipt of the expert's report, the Tribunal shall communicate a copy of the report to the parties, which shall be given the opportunity to express, in writing, their opinion on the report. A party may, subject to Article 48, examine any document on which the expert has relied in such a report.
(c) At the request of a party, the parties shall be given the opportunity to question the expert at a hearing. At this hearing, the parties may present expert witnesses to testify on the points at issue.
(d) The opinion of any expert on the issue or issues submitted to the expert shall be subject to the Tribunal's power of assessment of those issues in the context of all the circumstances of the case, unless the parties have agreed that the expert's determination shall be conclusive in respect of any specific issue.
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