(1) If:
(a) a maritime security plan for a maritime industry participant (the existing plan ) is in force; and
(b) the Secretary is no longer satisfied that the existing plan adequately addresses the relevant requirements under Division 4:
(i) because there is a change in the circumstances that relate to maritime transport, or offshore facility, security; or
(ii) because there is a change in circumstances that could impact on maritime transport, or offshore facility, security; or
(iii) for some other reason;
the Secretary may, by written notice given to the participant, direct the participant to give the Secretary another maritime security plan (the revised plan ).
(2) The notice must specify the period within which the revised plan must be given.
(2A) If the participant gives the Secretary the revised plan within the specified period, or within any further period allowed by the Secretary, sections 51 and 52 apply in relation to the revised plan.
(3) If the participant does not give the Secretary the revised plan within the specified period, or within any further period allowed by the Secretary, the Secretary must, by written notice given to the participant, cancel the approval of the existing plan.
(4) If the revised plan comes into force, it replaces the existing plan.