(a) is satisfied
that a condition to which the exemption is subject has not been complied with,
or
(b) is no longer satisfied of the matters referred to in section 42 (2).
(2) An exemption granted to a person is to be varied or cancelled by notice in
writing given to the person, and the variation or cancellation takes effect
from the day on which the notice is given, or from a later day specified in
the notice.
(3) An exemption granted to a class of persons is to be varied or
cancelled by notice published in the Gazette, and the variation or
cancellation takes effect on the day of publication, or from a later day
specified in the notice.
(4) A Competent Authority may vary or cancel
conditions to which the exemption is subject or impose new conditions.
