For the purposes of making a determination, a Conscientious Objection Tribunal may:
(a) take evidence on oath or affirmation; and
(b) summon a person to appear before it to give evidence; and
(c) summon a person to produce to it such documents as are referred to in the summons; and
(d) require a person appearing before it to give evidence either
to take an oath or to make an affirmation that the evidence that the person
will give will be true.