Judiciary Act 1903

The High Court in the exercise of its appellate jurisdiction may affirm reverse or modify the judgment appealed from, and may give such judgment as ought to have been given in the first instance, and if the cause is not pending in the High Court may in its discretion award execution from the High Court or remit the cause to the Court from which the appeal was brought for the execution of the judgment of the High Court; and in the latter case it shall be the duty of that Court to execute the judgment of the High Court in the same manner as if it were its own judgment.