13.—(1) The respondent Health Authority may at any time before they are notified of the date of the hearing of the appeal amend their reply or deliver a supplementary statement by way of reply.
(2) The respondent Health Authority may amend any reply or supplementary statement with the leave of the panel to which the case has been allocated at any time after they have been notified of the date of the hearing of the appeal or at the hearing itself and the panel may grant such leave on such terms as it thinks fit.
(3) The Health Authority may apply in writing to the FHSAA for directions to be given as to any matter relating to the hearing of the appeal.
(4) The Health Authority shall send a copy of every amendment and supplementary statement to the FHSAA.