The Commonwealth v Ockenden

The Commonwealth appealed to the High Court of Australia against a decision of the County Court at Melbourne, which had allowed an appeal by James Bruce Ockenden. Ockenden had claimed compensation from the Commonwealth under the Commonwealth Employees' Compensation Act 1930-1956 for personal injury allegedly sustained arising out of or in the course of his employment. The County Court had ordered the Commonwealth to pay Ockenden a sum for the cost of medical treatment.

The central legal issue before the High Court was whether Ockenden had sustained "personal injury by accident arising out of or in the course of his employment" as required by section 9(1) of the Act. Specifically, the court had to determine if a progressive disease, not attributable to employment, could result in a compensable injury by accident if a sudden physiological change occurred during the course of employment, and whether such a change had been proven in Ockenden's case.

The High Court held that a worker does not suffer personal injury by accident arising out of or in the course of employment if they experience a sudden and distinct physiological change that is solely the product of the inevitable development of a progressive disease, and which cannot be attributed to or associated with any incident of their employment. The court distinguished this situation from cases where an external event or action causes a physiological change. In Ockenden's case, the court found that the evidence did not establish a sudden and distinct physiological change, nor did it prove that any such change, if it occurred, happened during the course of his employment. The court noted that the murmur detected in Ockenden's heart was likely the result of a gradual deterioration from a childhood illness, and there was no evidence linking its onset or progression to any specific incident of his naval service.

Consequently, the High Court allowed the appeal, set aside the order of the County Court, and ordered that the Commonwealth pay the taxed costs of the appeal.