67(1)A conciliation board has the power of summoning before it any witnesses and of requiring them to give evidence on oath, or if they are persons entitled to affirm in civil matters, on affirmation, and orally or in writing, and to produce such documents and things as the conciliation board deems requisite to the full investigation and consideration of the matters referred to it.

67(2)A conciliation board has the same power to enforce the attendance of witnesses and to compel them to give evidence as is vested in any court of record in civil cases.

67(3)Any member of a conciliation board may administer an oath or affirmation, and the conciliation board may receive and accept evidence on oath or affirmation, affidavit or otherwise as in its discretion the board may deem fit and proper, whether admissible as evidence in a court of law or not.

67(4)A conciliation board, or a member thereof, or any person who has been authorized for such purpose in writing by a conciliation board, may, without any other warrant than this section, at any time, enter a building, ship, vessel, factory, workshop, place or premises of any kind where work is being or has been done or commenced by employees or in which an employer carries on business or any matter or thing is taking place or has taken place, concerning the matters referred to the conciliation board, and may inspect and view any work, material, machinery, appliance or article therein, and interrogate any person in or upon any such place, matter or thing hereinbefore mentioned; and no person shall hinder or obstruct the board, member or any person authorized by the board, in the exercise of a power conferred by this subsection or refuse to answer an interrogation made.