13.—(1) Subject to sub paragraph (2), to require any person whom he has reasonable cause to believe has any information relevant to any examination or investigation under paragraph 3 to answer such questions as the authorised person thinks fit to ask.
(2) The person referred to in sub paragraph (1) may only be required to answer such questions in the absence of persons other than–
(a)a person nominated by that person to be present; and
(b)any person whom the authorised person may allow to be present.