A party who has had an issue determined against them by the Full Court cannot re-litigate that issue in subsequent proceedings between the same parties merely by arguing the earlier decision was incorrect; this constitutes an abuse of process. The distinction between the Warden's Court and the Warden sitting in open court under the Mining Act 1978 (WA) was confirmed, though McKechnie J's obiter analysis suggests a Warden in open court may have incidental power to issue subpoenas. The question whether subpoena power extends to proceedings heard by a Warden acting judicially but not as the Warden's Court was expressly left open by Owen J.
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