When the QCAT Appeal Tribunal decides an appeal on a question of law only under s 146, it can substitute its own decision only if the determination of the legal question is capable of resolving the matter as a whole; otherwise it must return the matter to the original decision-maker. Under s 147, the Appeal Tribunal must identify the specific error of mixed fact and law and address whether leave has been granted before conducting a rehearing and interfering with the original decision-maker's exercise of discretion. The circumstances leading to a licence breach remain relevant to the exercise of the cancellation discretion even where the suspension decision itself cannot be reviewed.
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