(a) the AAT has reviewed a decision on application referred to in section 111 or 128 of the Family Assistance Administration Act; and
(b) that review involved (wholly or partly) a review of a determination to which a care percentage decision relates;
the AAT must not, on AAT first review of the care percentage decision, vary or
substitute the decision in a way that would have the effect of varying or
substituting the determination referred to in paragraph (b).