(1) Subject to subsection (2), an application for a warrant shall be in writing.
(2) If the person making an application for a warrant on an agency's behalf:
(a) is the chief officer of the agency or a person in relation to whom an authorisation by the chief officer is in force under subsection (3); and
(b) thinks it necessary, because of urgent circumstances, to make the application by telephone;
the person may make the application by telephone.
(3) The chief officer of an agency may authorise in writing, for the purposes of subsection (2), persons who, or classes of persons who, are entitled under section 39 to make applications on the agency's behalf.