In establishing an offshore security zone, the Secretary must:
(a) have regard to the purpose of the zone; and
(b) take into account:
(i) the existing physical features of the security regulated offshore facility; and
(ii) the existing operational features of the facility; and
(iii) the views of the offshore facility operator and, if all or part of the zone is within a security regulated port, the port operator for that port; and
(c) act consistently with Australia's obligations under international law.