(1) An authorised officer holds office on the conditions stated in--
(a) the officer's instrument of appointment under this Act; or
(b) a signed notice given to the officer; or
(c) a regulation.
(2) The instrument of appointment, a signed notice given to the authorised officer or a regulation may limit the officer's powers under this Act.
(3) In this section--
signed notice means a notice signed by the chief executive.