At any inquiry the Tribunal may ¾

(a) require any person to make oath or affirmation that he or she will truly answer all questions put to him or her by the Tribunal and by any party to the inquiry relating to any matter being inquired into by the Tribunal (which oath or affirmation may be administered by a member of the Tribunal); and

(b) require any person appearing before the Tribunal, including any person whose conduct is subject to an inquiry, (whether he or she has been summoned to appear or not) to answer any relevant questions put to him or her by any member of the Tribunal or by any other person appearing before the Tribunal.