The appointment of an inspector under this Act ceases immediately if—
(a) the inspector ceases to be an employee under Part 3 of the Public Administration Act 2004 ; or
(b) if the inspector was appointed under section 160(1)(b), the inspector ceases to be appointed as an inspector, enforcement officer or authorised officer by or under any other Act; or
(c) the Minister revokes the appointment under section 162; or
(d) the person resigns his or her appointment.