(1) The CEO may vary a
CEO exemption only if satisfied —
(a)
that —
(i)
since the exemption was granted, a change has happened in
relation to something the CEO considered in deciding to grant the exemption;
and
(ii)
the exemption would have been granted as it is proposed
to be varied if the change had happened before the exemption was given;
or
(b) that
the application for the exemption was false or misleading in a material
respect but the circumstances do not require its cancellation.
(2) In deciding
whether to vary a CEO exemption, the CEO must take into account the likelihood
and significance of any adverse effect on safety or the environment if the
variation were made.