21LWhen order starts and ceases to have effect

21L When order starts and ceases to have effect (1) A preventative detention order in relation to a person starts to have effect: (a) if the order so provides, on an order for the person's detention made under a corresponding law ceasing to have effect; or (b) otherwise, when it is made. (2) A preventative detention order in relation to a person under which the person is required to be taken into custody ceases to have effect at the end of the period of 48 hours after the order is made if the person has not been taken into custody under the order within that period. (3) If a preventative detention order does not cease to have effect under subsection (2), it ceases to have effect when whichever of the following first occurs: (a) the period during which the person may be detained under the order ends; (b) the order is revoked under section 21P, 21S or 21T.