(1) Subject to subsection (2), if--
(a) a preventative detention order is in force for a person; and
(b) a police officer believes on reasonable grounds that the person is on any premises;
the police officer may enter the premises, using the force that may be necessary and reasonable in the circumstances and with the assistance of other police officers that may be necessary, at any time of the day or night to search the premises for the person and to take the person into custody.
(2) A police officer must not enter a dwelling house under subsection (1) at any time during the period commencing at 9p.m. on a day and ending at 6a.m. on the following day unless the police officer believes on reasonable grounds that--
(a) it would not be practicable to take the person into custody, either at the dwelling house or elsewhere, at another time; or
(b) it is necessary to do so in order to prevent the concealment, loss or destruction of evidence of, or relating to, a terrorist act.
(3) In this section--
dwelling house includes a conveyance, and a room in a hotel, motel, boarding house or club, in which people ordinarily retire for the night.