17.—(1) The office of the Supreme Court out of which a writ of subpoena ad testificandum or a writ of subpoena duces tecum in aid of an inferior court or tribunal may be issued is the Crown Office, and no order of the Court for the issue of such a writ is necessary.
(2) A writ of subpoena in aid of an inferior court or tribunal continues to have effect until the disposal of the proceedings before that court or tribunal at which the attendance of the witness is required.
(3) A writ of subpoena issued in aid of an inferior court or tribunal must be served personally.
(4) Unless a writ of subpoena issued in aid of an inferior court or tribunal is duly served on the person to whom it is directed not less than 4 days, or such other period as the Court may fix, before the day on which the attendance of that person before the court or tribunal is required by the writ, that person shall not be liable to any penalty or process for failing to obey the writ.
(5) An application to set aside a writ of subpoena issued in aid of an inferior court or tribunal may be heard by the Master (Queen's Bench and Appeals).