(1) If an application is made to a court or tribunal for a proceeding suppression order, the court or tribunal may make an interim order in respect of that application.
(2) An interim order may be made without determining the merits of the application under section 18.
(3) An interim order has effect until—
(a) the substantive application is determined; or
(b) the interim order is revoked by a court or tribunal.
(4) If a court or tribunal makes an interim order, the court or tribunal must determine the substantive application for the proceeding suppression order as a matter of urgency.