(1) For an inquiry, the board is not bound by the rules of evidence and may be informed of anything in any way it considers appropriate, but, for the exercise of a supervisory function, must observe natural justice.
(2) An inquiry must be conducted with as little formality and technicality, and with as much expedition, as the requirements of this Act and any other relevant enactment and a proper consideration of the matters before the board allow.
(3) Proceedings at an inquiry are not open to the public, unless the board decides otherwise in a particular case.
(4) Subject to part 9.2 (Hearings for inquiry), a person is entitled to be present at a meeting of the board only with the board's leave.
(5) Subsection (4) does not apply to the following:
(a) the secretary of the board;
(b) an escort officer escorting an offender for an inquiry;
(c) a public servant assisting the board for the inquiry.
(6) A decision of the board is not invalid only because of any informality or lack of form.