Rule 22 Proceedings by or against the Crown

In any proceedings by or against the Crown, [^f1 the judge or district judge as the case may be] may, where he thinks it necessary, make an order for the examination upon oath before an officer of the court or before any other person, and at any place, of any witness or person, and may empower any party to the proceedings to give such deposition in evidence therein on such terms (if any) as [ the judge or district judge as the case may be] may direct.