(1) A person covered by subsection (2) must not appear in a proceeding in the Tribunal:
(a) as a representative of a party to the proceeding; or
(b) as an expert witness in the proceeding.
(2) The following persons are covered by this subsection:
(a) a member;
(b) a person who ceased to be a member during:
(i) the 12 months before the day of the appearance; or
(ii) if a law of a State or Territory has the effect of prescribing a longer period before the day of the appearance--that longer period.
(3) Subsection (1) does not apply if the person has permission to appear in the proceeding from:
(a) if the person is the President--the Minister; or
(b) in any other case--the President.