(1) Evidence of anything said, or any admission made, during participation in mediation under section 20X is not admissible:
(a) in any court (whether exercising federal jurisdiction or not); or
(b) in any proceedings before a person authorised by a law of the Commonwealth or of a State or Territory, or by the consent of the parties, to hear evidence.
(2) This section applies whether or not a party is directed to participate in the mediation.