Anything done before the commencement of Schedule 1 to the Acts Interpretation Amendment Act 2011 by or in relation to a person purporting to act under an appointment under section 67 of this Act is not invalid merely because:
(a) the occasion for the appointment had not arisen; or
(b) there was a defect or irregularity in connection with the appointment; or
(c) the appointment ceased to have effect; or
(d) the occasion to act had not arisen or had ceased.