5.—(1) A determination under paragraph 4, so far as relating to any financial matter, shall be made on the basis of what is just in all the circumstances of the case.
(2) A determination under paragraph 4, so far as relating to any other matter, shall be made on the basis of what appears to the Authority to be appropriate in all the circumstances of the case having regard, in particular, to what is necessary or expedient for implementation purposes.