(1) On an appeal under this Division, the Supreme Court is to decide what the correct and preferable decision is having regard to the material then before it, including the following--(a) any relevant factual material,(b) any applicable written or unwritten law.
(2) In determining the appeal, the Supreme Court may decide--(a) to affirm the decision under appeal, or(b) to vary the decision under appeal, or(c) to set aside the decision under appeal, or(d) to set aside the decision under appeal and make a decision in substitution for the decision that is set aside.