9. On receiving the notice of appeal and the additional material the Secretary of State must in each case without delay—
(a)send an acknowledgement of its receipt to the appellant or the Director, as appropriate, and
(b)send a copy of it to the appellant or the Director, as appropriate.
10.—(1) Where notice of an appeal or additional material has been received by the Secretary of State and she considers that the appeal could be decided more fairly and efficiently if the appellant provided clarification of his grounds or if the Director provided further additional material, the Secretary of State may serve on the appellant or the Director, as appropriate, a notice to that effect, inviting the relevant party to provide that clarification or to supply that material to the Secretary of State within twenty-one days of the date of the notice.
(2) Where the Secretary of State serves a notice under paragraph (1) on either the appellant or the Director, she must at the same time inform the other party to the appeal that she has done so and must without delay send to the appellant or the Director, as appropriate, a copy of any document she receives under this regulation.