61.6.—(1) The general rule is that, unless the Crown Court orders otherwise, any fact which needs to be proved in restraint proceedings or receivership proceedings by the evidence of a witness is to be proved by their evidence in writing.
(2) Where evidence is to be given in writing under this rule, any party may apply to the Crown Court for permission to cross-examine the person giving the evidence.
(3) If the Crown Court gives permission under paragraph (2) but the person in question does not attend as required by the order, his evidence may not be used unless the court gives permission.