(1) An appointment of an appointed officer or appointed inspector has effect--(a) for the period stated in the instrument of appointment, or(b) if a period is not stated--until revoked by the Minister.
(2) The Minister may, by written instrument, revoke or amend an appointment at any time.
(3) If an appointment of an appointed officer or appointed inspector is made by reference to a particular office, the person appointed ceases to be an appointed officer or appointed inspector if the person ceases to hold the office.