(1) A person is exempt from the activity test for a period if the Secretary makes a determination under this Subdivision.
(2) The Secretary may revoke a determination under this Subdivision if the Secretary is satisfied that the grounds on which the determination was made no longer exist.
(3) Subsection (2) does not affect any operation that subsection 33(3) of the Acts Interpretation Act 1901 has in relation to a determination under this Subdivision.