Under s 213(4) of the Workers Compensation and Injury Management Act 1981 (WA), an arbitrator's reasons need only identify the facts accepted and the reasons for doing so, but where a medical report is the subject of specific attack, the arbitrator must at least indicate why the attacks were rejected. However, where the Commissioner on appeal conducts a detailed review and provides adequate reasons of his own, the Commissioner's error in failing to detect the arbitrator's inadequacy of reasons does not vitiate the outcome.
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