If:
(i) a decision (a family assistance decision ) on application referred to in section 111 of the Family Assistance Administration Act; or
(ii) a decision on application referred to in section 131D of the ART Act in relation to a family assistance decision; and
(b) that review involved (wholly or partly) a review of a determination to which a care percentage decision relates;
the ART must not, on ART 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).