A. Any party to a proceeding under this title may serve interrogatories or cause the depositions of witnesses residing within or without the Commonwealth to be taken, the costs to be taxed as other costs by the Commission. All interrogatories, depositions, or any other discovery shall conform to rules governing discovery promulgated by the Commission.
B. The Commission shall adopt rules governing discovery conforming as nearly as practicable to Part Four of the Rules of the Virginia Supreme Court.