The Board may, in hearings arising under this chapter, except as provided for in Articles 7 (§ 46.2-1566 et seq.), 7.2 (§ 46.2-1573.2 et seq.), 7.3 (§ 46.2-1573.13 et seq.), and 7.4 (§ 46.2-1573.25 et seq.), determine the place in the Commonwealth where they shall be held; subpoena witnesses; take depositions of witnesses residing outside the Commonwealth in the manner provided for in civil actions in courts of record; pay these witnesses the fees and mileage for their attendance as is provided for witnesses in civil actions in courts of record; and administer oaths.