(1) If:
(a) a specific threat of unlawful interference with aviation is made or exists; or
(b) there is a change in the nature of an existing general threat of unlawful interference with aviation; or
(c) both of the following apply:
(i) a national emergency declaration (within the meaning of the National Emergency Declaration Act 2020 ) is in force;
(ii) the Secretary is satisfied that additional security measures are appropriate to support the national emergency declaration;
the Secretary may, in writing, direct that additional security measures be taken or complied with.
(2) A direction under subsection (1) is a special security direction .