(1) If—
| (a) | a maritime security plan for a maritime industry participant (the existing plan) is in force; and |
| (b) | the Director-General is no longer satisfied that the existing plan adequately addresses the relevant requirements under Division 3— |
| (i) | because there is a change in the circumstances that relate to maritime transport security; or |
| (ii) | because there is a change in the circumstances that could impact on maritime transport security; or |
| (iii) | for some other reason, |
the Director-General may, by written notice given to the participant, direct the participant to give the Director-General a revised plan under regulation 51.
| (2) | The notice must specify the period within which the revised plan must be given. |
| (3) | If the participant does not give the Director -General the revised plan within the specified period, or within any further period allowed by the Director-General, the Director-General must, by written notice given to the participant, cancel the approval of the existing plan. |
