(1) The Authority may, for the purposes of an inquiry under section 58, do all or any of the following:
(a) require any person, by notice delivered to that person, to supply to the Authority such information as it specifies in the notice and requires for the purpose of the inquiry;
(b) require any person, by notice delivered to that person, to produce to the Authority or to send to it, any document specified in the notice and in that person's power or control;
(c) summon witnesses, by notice delivered to them, to attend before the Authority;
(d) administer oaths and affirmations to witnesses and examine witnesses attending before the Authority.
(2) A notice shall not be regarded as delivered to a person for the purposes of any paragraph of subsection (1) unless it is delivered to the person -
(a) personally, or
(b) by registered post,
and the notice shall be signed by at least one member of the Authority.
(3) No notice under subsection (1) shall be delivered unless -