(1)Unless otherwise agreed by the parties, the arbitral tribunal:
(a)may appoint one or more experts to report to it on specific issues to be determined by the arbitral tribunal;
(b)may require a party to give the expert any relevant information or to provide access to any relevant documents, goods or other property for his inspection.
(2)Unless otherwise agreed by the parties, if a party so requests or if the arbitral tribunal considers it necessary, the expert shall, after delivery of his written or oral report, participate in a hearing where the parties have the opportunity to put questions to him and to present expert witnesses in order to testify on the points at issue.