Northern Territory Consolidated Acts(1) The Minister may appoint a Commissioner who is eligible for appointment as Chairman to act in the office of Chairman where:
(a) there is a vacancy in the office, whether or not an appointment has previously been made to the office; or
(b) the Chairman is, or is expected to be, absent from duty or from the Territory or is, for any reason, unable to perform the duties of his or her office.
(2) The Minister may at any time terminate an appointment under this section.
(3) A person appointed to act in the office of Chairman may resign the appointment by writing signed by him or her delivered to the Minister.
(4) The validity of anything done by a person acting in the office of Chairman shall not be called in question on the ground that the occasion for his or her appointment had not arisen or that the appointment had ceased to have effect or that the occasion for the person to act had not arisen or had ceased.