Upon acceptance of appointment as prescribed in Rule 9, the Arbitrator shall have power and authority:
In addition, if, but only if, the Arbitration Agreement so provides, the Arbitrator shall have power and authority to issue subpoenas and to award commissions to permit a deposition to be taken, in the manner and on the terms designated by the Arbitrator, of a witness who cannot be subpoenaed.
Del. Rap. Arbit. R. 6