Board of inquiry
21.  When, in the notification in the Gazette appointing a board of inquiry, the Minister so directs, the chairman of the board of inquiry or if the board of inquiry consists of one person such person may —
(a)order any person who appears to the board of inquiry to have any knowledge of the subject-matter of the inquiry to furnish in writing such particulars in relation thereto as the board of inquiry may require;
(b)summon any person who appears to the board of inquiry to have any knowledge of the subject-matter of the inquiry to attend before the board of inquiry to give evidence on affirmation or otherwise relating to the subject-matter of the inquiry and examine him; and
(c)summon any person to produce to the board of inquiry any document in his possession which the board determines to be relevant to the subject-matter of the inquiry.