The testimony of any witness may be taken by deposition at the instance of a party in any proceeding or investigation, at any time after the same is at issue, by the consent of the Commission. The Commission may, of its own motion, order testimony to be taken by deposition in any proceeding or investigation pending before it at any stage of such proceeding or investigation. Such deposition shall be taken in the manner prescribed by the laws of West Virginia for taking depositions in civil cases in courts of record.
W. Va. Code R. § 171-2-14