(1) If--
(a) a preventative detention order is in force for a person; and
(b) the police officer who is detaining the person under the order is satisfied that the grounds on which the order was made no longer exist;
the police officer must apply to the issuing authority for the revocation of the order.
(2) If--
(a) a preventative detention order is in force for a person; and
(b) on an application under subsection (1) by a police officer, the issuing authority is satisfied that the grounds on which the order was made no longer exist;
the issuing authority must revoke the order.
(3) If--
(a) a prohibited contact order is in force in relation to a person's detention under a preventative detention order; and
(b) the police officer who is detaining the person under the preventative detention order is satisfied that the grounds on which the prohibited contact order was made no longer exist;
the police officer must apply to the issuing authority for the revocation of the prohibited contact order.
(4) If--
(a) a prohibited contact order is in force in relation to a person's detention under a preventative detention order; and
(b) on an application by a police officer under subsection (3), the issuing authority is satisfied that the grounds on which the prohibited contact order was made no longer exist;
the issuing authority must revoke the prohibited contact order.