(1) An appeal must be heard as soon as is reasonably practicable after it is lodged.
(2) An appeal is by way of rehearing.
(3) On hearing the appeal, the court—
(a) may confirm, reverse, or modify the decision appealed against; and
(b) may make any other decision that the Commissioner could have made.
(4) The court must not review—
(a) any part of a decision not appealed against; or
(b) any decision not appealed against at all.