9.—(1) The appropriate body may at any time before it receives notice of the date fixed for the hearing under paragraph 13 or of a decision of the Council under paragraph 11 —
(a)send copies of such additional documents as it wishes to rely on for the purpose of opposing the appeal to the proper officer;
(b)amend or withdraw its reply, or any part of it;
(c)amend or withdraw any material submitted in support of the reply.
(2) The appropriate body may at any time take any step mentioned in sub-paragraph (1) with the leave of the Council.
(3) A reply may be amended or withdrawn by sending to the proper officer an amended reply or a notice stating that the reply is withdrawn, as the case may be.