After section 124--
insert--
'(1) A person who is appointed as an inspector or inspection officer holds office on any conditions stated in--
(a) the person's instrument of appointment; or
(b) a signed notice given to the person by the chief executive.
'(2) The instrument of appointment, a notice given to the person by the chief executive or a regulation may limit the person's functions or powers under this Act for the office.'.