7.—(1) Without prejudice to Article 53 as it applies by virtue of paragraph 8(1), where an appeal is made to the Commissioner under paragraph 4, the Commissioner shall investigate the subject matter of the appeal and shall review the completion notice.N.I.
(2) In the course of his investigation the Commissioner shall afford to every person who appears to him to be concerned therewith an opportunity to comment on the subject matter of the appeal and to furnish oral or other evidence respecting it.
(3) Without prejudice to sub-paragraph (2), the Commissioner may obtain information from such persons and in such manner and make such inquiries as he considers appropriate, and may call for a report from any suitably qualified person.
(4) Where the Commissioner—
(a)dismisses an appeal; or
(b)determines a day under paragraph 4(2),
he shall serve notice of the dismissal or, as the case may require, a statement of his reasons for making that determination, on
(i)the appellant;
(ii)the Department; and
(iii)every other person who submitted comments or furnished evidence to the Commissioner in connection with the appeal.]