(a) Unless otherwise agreed by the parties, the arbitrators:

(1) May appoint one or more experts to report on specific issues to be determined by the arbitrators; and

(2) 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 arbitrators consider 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.