The Governor - General may appoint a person to act as Official Secretary:
(a) during a vacancy in the office of Official Secretary, whether or not an appointment has previously been made to the office; or
(b) during any period, or during all periods, when the Official Secretary is absent from duty or from Australia, or is, for any other reason, unable to perform the functions of the office of Official Secretary.
Note: For rules that apply to acting appointments, see section 33A of the Acts Interpretation Act 1901 .