A person’s interlock exemption stops having effect when whichever of the following happens first—
(a) the exemption certificate expires;
(b) 14 days elapse after the person gives the chief executive a notice under section 91Y ;
(c) the exemption is cancelled under section 19 ;Note—Section 19 provides the procedure for cancelling an approval which, as defined in section 17A , includes an interlock exemption.
(d) the interlock period ends.