BHP Billiton Iron Ore Pty Ltd v Treby

BHP Billiton Iron Ore Pty Ltd was the appellant in the case against Treby, the respondent, which was heard in the Full Court of the Federal Court of Australia. The primary dispute concerned the validity of an arbitrator’s decision on a workers' compensation claim, focusing on the arbitrator's reliance on the medical opinion of Mr Wong, a neurosurgeon, over that of Dr Flahive, an occupational physician, in determining the nature and cause of Treby's injury. The appellant argued that the arbitrator's decision was flawed because it improperly preferred Mr Wong’s report over Dr Flahive's and because the basis of Mr Wong’s opinion was not sufficiently disclosed. Additionally, the appellant contended that the reliance on Mr Wong's report rendered the arbitrator’s decision unreasonable or irrational.

The court examined whether the appeal to the primary judge involved a question of law or fact, particularly focusing on the arbitrator's application of the burden of proof and the probative value of the evidence. The appellant initially argued that the appeal involved a question of law based on administrative law principles, referencing several High Court decisions. However, in the course of the appeal, the appellant shifted its argument to focus on the proper application of the burden of proof by the arbitrator. The court needed to determine whether the primary judge correctly identified the nature of the appeal and whether the points raised by the appellant were meritorious.

The court concluded that the appeal did not fundamentally involve a question of law but rather a question of fact, as it pertained to the credibility of evidence and the arbitrator’s findings on the nature and cause of Treby's injury. The court held that the primary judge was correct in finding that the appeal involved a question of fact. Furthermore, the court found that the appellant’s arguments were unmeritorious because the arbitrator's findings were supported by the evidence, particularly the respondent’s testimony, which the arbitrator deemed credible. The court also noted that the arbitrator's reliance on Mr Wong's report was not improper, as the report provided a sufficient basis for the arbitrator's decision. The appeal was therefore dismissed.

The court made no further orders beyond dismissing the appeal, affirming the decision of the primary judge.