(A) Unless otherwise agreed by the parties, the arbitral tribunal may appoint one or more experts to report to it on specific issues to be determined by the tribunal and may require a party to give the expert any relevant information or to produce, or to provide access to, any relevant documents, goods, or other property for his inspection.

(B) Unless otherwise agreed by the parties, if a party so requests or if the arbitral tribunal considers it necessary, the expert, after delivery of his written or oral report, shall participate in an oral hearing at which the parties have the opportunity to question the expert and to present expert witnesses on the points at issue.