(1) The authority conferred by a stored communications warrant may only be exercised by a person in relation to whom an approval under subsection (2) is in force in relation to the warrant.
(2) The chief officer of a criminal law - enforcement agency, or an officer of a criminal law - enforcement agency in relation to whom an appointment under subsection (3) is in force, may approve any of the following persons to exercise the authority conferred by warrants (or classes of warrants) issued to the agency:
(a) officers (or classes of officers) of the agency or another criminal law - enforcement agency;
(b) staff members (or classes of staff members) of the agency or another criminal law - enforcement agency.
(3) The chief officer of a criminal law - enforcement agency may appoint in writing an officer of the agency to be an approving officer for the purposes of subsection (2).