15.—(1) The Department shall notify the appellant in writing of its determination of the appeal and shall provide him with a copy of any report mentioned in regulation 14(8).
(2) The Department shall at the same time send—
(a)a copy of the documents mentioned in paragraph (1) to the enforcing authority and to any persons required under regulation 12(1)(b)(ii) to be notified of the appeal; and
(b)a copy of its determination of the appeal to a person mentioned in regulation 12(1)(a) and (b)(i) who made representations to the Department and, if a hearing was held, to any other person who made representations in relation to the appeal at the hearing.