44. Evidence

to procure and receive all such evidence written or oral, and to examine all such persons as witnesses, as it may think necessary or desirable to procure, receive or examine ; and

to require the evidence, whether written or oral of any witness to be given on oath or affirmation and such oath or affirmation to be that which would be required of that witness if he was giving evidence in a court, and to administer an oath or affirmation to every such witness.