(1) If:
(a) a transport security program for an aviation industry participant (the existing program ) is in force; and
(b) the Secretary is no longer satisfied that the program adequately addresses the relevant requirements under Division 4:
(i) because there is a change in the circumstances that relate to aviation security; or
(ii) because there is a change in circumstances that could impact on aviation 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 transport security program (the revised program ).
(2) The notice must specify the period within which the revised program must be given.
(2A) If the participant gives the Secretary the revised program within the specified period, or within any further period allowed by the Secretary, sections 19 and 20 apply in relation to the revised program.
(3) If the participant does not give the Secretary the revised program 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 program.
(4) If the revised program comes into force, it replaces the existing program.