(1) A competent authority that gives an exemption may cancel the exemption if the authority—
(a) is satisfied on reasonable grounds that a condition of the exemption has not been complied with; or
(b) is no longer satisfied on reasonable grounds about a matter mentioned in section 151 (2).
(2) The competent authority may also—
(a) amend or cancel a condition of the exemption; or
(b) put a new condition on the exemption.
(3) An exemption given to a person may only be amended or cancelled by written notice given to the person.
(4) The amendment or cancellation takes effect when it is given to the person or, if a later day is stated in the notice, on the stated day.
(5) An exemption given to a class of people may only be amended or cancelled by written notice.
(6) A notice mentioned in subsection (5) is a notifiable instrument.
Note A notifiable instrument must be notified under the Legislation Act.