(1) If a request for review of a decision is made in accordance with section 24, the Commission must:
(a) review the decision; and
(b) affirm the decision or set it aside.
(2) If the Commission sets the decision aside it must substitute a new decision in accordance with this Act.
(3) If the Commission has delegated its powers under this section to the person who made the decision under review, that person must not review the decision.