Va. Code § 16.1-69.21
In the event of the inability of the judge to perform the duties of his office or any of them by reason of sickness, absence, vacation, interest in the proceeding or parties before the court, or otherwise, such judge or a person acting on his behalf shall promptly notify the appropriate chief district judge of such inability. If the chief district judge determines that the provisions of § 16.1-69.35 have been complied with or cannot reasonably be done within the time permitted and that no other full-time or retired judge is reasonably available to serve, the chief district judge may direct a substitute judge to serve as a judge of the court, which substitute may serve concurrently with one or more of the judges of the court or alone. When reasonably necessary, the chief district judge may designate a substitute judge from another district within the Commonwealth. The committee on district courts may adopt policies and procedures governing the utilization of substitute judges. In such event, those policies and procedures will, where applicable, control. While acting as judge, a substitute judge shall perform the same duties, exercise the same power and authority, and be subject to the same obligations as prescribed herein for the judge. A substitute judge shall retain the power to enter a final order in any case heard by such substitute judge for a period of 14 days after the date of a hearing of such case. While serving as judge of the court, the judge or the substitute judge may perform all acts with respect to the proceedings, judgments and acts of any other judge in connection with any action or proceeding then pending or theretofore disposed of in the court except as otherwise provided in this chapter in the same manner and with the same force and effect as if they were his own.
Va. Code § 16.1-69.21