R v Commonwealth Treasurer; Ex parte

The parties to this matter were the Commonwealth Treasurer and the Commonwealth of Australia, who sought to prohibit the Commonwealth Court of Conciliation and Arbitration from proceeding with a certain industrial dispute. The dispute concerned claims made by the Australian Workers' Union against the Commonwealth for wages and conditions of employment. The Treasurer and the Commonwealth sought to prevent the Court from exercising its jurisdiction in relation to these claims.

The central legal issue before the High Court of Australia was whether the Commonwealth Court of Conciliation and Arbitration had the constitutional power to make an award binding upon the Commonwealth itself in respect of its employees. Specifically, the Court was required to determine if the arbitration power conferred by section 51(xxxv) of the Constitution extended to industrial disputes involving the Commonwealth as an employer.

The High Court, in a majority decision, held that the arbitration power under section 51(xxxv) of the Constitution did not extend to making awards binding on the Commonwealth. The reasoning was that the Commonwealth, as a sovereign entity, could not be compelled by its own legislation to submit to arbitration in relation to its employees. The Court distinguished between the Commonwealth acting as a private employer and its exercise of governmental functions, concluding that the arbitration power was intended to regulate disputes between private employers and employees, or between states and their employees, but not disputes where the Commonwealth itself was the party against whom the award would be made.

The High Court made absolute the order nisi for prohibition, thereby preventing the Commonwealth Court of Conciliation and Arbitration from proceeding with the hearing and determination of the industrial dispute.