For the purposes of AAT first review of a decision, a reference in the AAT Act to the person who made the decision is taken to be a reference to:
(a) the Secretary; and
(b) if the decision was made by the Chief Executive Centrelink or a Departmental employee (within the meaning of the Human Services (Centrelink) Act 1997 ) as a delegate of the Secretary or the Employment Secretary--the Chief Executive Centrelink.