(1) A person who claims to be exempt from service because of conscientious beliefs must, within 7 days after he or she is called on for service under section 60 apply to the Secretary, in writing, to have his or her claim determined by a Conscientious Objection Tribunal.
(2) At any time after a Tribunal has made a determination that a
person is or is not exempt from service because of conscientious beliefs
either the applicant for that determination or the Commonwealth may apply to
the Secretary, in writing, to have a Tribunal set aside the previous
determination and, where appropriate, make a new determination in substitution
for it on the grounds of a change in circumstances.