If, on AAT first review, the AAT sets aside a decision (other than an employment pathway plan decision) and substitutes for it a decision that a person is entitled to a social security payment, the AAT must:
(a) assess the rate at which the social security payment is to be paid to the person; or
(b) ask one of the following persons to assess the rate at which the social security payment is to be paid:
(i) for a decision in relation to a pension bonus or pension bonus bereavement payment--the Secretary;
(ii) for other decisions--the Secretary or the Chief Executive Centrelink, as the case requires.