"89. (1) ...
(2) A person who disembarks from an aircraft at a
proclaimed airport, whether or not that airport is the first port
of call of the aircraft in Australia, being a stowaway or a person
whom an authorized officer reasonably believes would become an
illegal entrant if the person were to enter Australia (whether or
not the person is seeking to enter Australia), may, at any time
before the person leaves the airport:
(a) if an authorized officer so directs; or
(b) if the master of the aircraft so requests and an
authorized officer approves;
be taken into custody by an officer and kept in such custody,
either at the proclaimed airport or elsewhere, as an authorized
officer directs until such time as the person is removed from
Australia or the person is granted an entry permit.
(3) ...
(4) Where a person is taken into custody under subsection
(1), (2) or (3), an authorized officer may, at any time within 48
hours after the person is so taken into custody, by notice in
writing served on the master, owner, agent or charterer of the
aircraft on which the person travelled to Australia, require the
master, owner, agent or charterer to remove the person from
Australia at no charge to the Commonwealth."
(5) ...
(6) ...
(7) ...
(7A) ...
(7B) A person who is taken into custody under subsection
(1),(2) or (3) may be kept in custody until the person is removed
from Australia in accordance with arrangements made by an
authorised officer.
(7C) Failure to give a notice in accordance with subsection
(4):
(a) does not prevent the person concerned from being kept
in custody as mentioned in subsection (7B); and
(b) does not prevent the person concerned from being
removed from Australia as mentioned in subsection
(7B).
(8) A person who is taken into or held in custody under
the section:
(a) is taken not to enter Australia unless he or she is
granted an entry permit; and
(b) if the person is granted an entry permit:
(i) if the entry permit is granted while the person
is at a proclaimed airport - he or she is taken
to enter Australia when he or she first leaves
the airport after the entry permit is granted;
and
(ii) if the entry permit is granted after the person
has been taken from a proclaimed airport - he or
she is taken to enter Australia when the entry
permit is granted.
(8A) An officer may, without warrant, arrest a person who
has escaped from custody in which the person was being held under
this section and return the person to custody."
(9) ... "