R v Commonwealth Conciliation and Arbitration Commission; Ex parte Amalgamated Engineering Union (Australian Section)

The applicant, the Amalgamated Engineering Union (Australian Section), sought a writ of prohibition against the Commonwealth Conciliation and Arbitration Commission and its members, as well as the Minister for Labour and National Service. The dispute concerned the Commission's purported exercise of jurisdiction to make a certain award, which the applicant contended was beyond its powers.

The central legal issue before the High Court was whether the Commission had acted within its constitutional and legislative authority in making the award. Specifically, the Court was required to determine if the Commission had exceeded its jurisdiction by including provisions in the award that were not authorised by the relevant legislation, particularly in relation to matters concerning the employment of persons who were not members of the applicant union.

The Court reasoned that the Conciliation and Arbitration Act 1904 (Cth) conferred jurisdiction upon the Commission to make awards binding on organisations and their members, and employers. However, it found that the Commission had purported to make an award binding on persons who were not members of the applicant union, and who were not employers of the applicant's members, in circumstances where the Act did not grant such power. The Court applied the principle that a tribunal exercising statutory powers must act strictly within the limits of its jurisdiction, and that any attempt to exercise power beyond those limits is a nullity.

Consequently, the High Court made absolute the order nisi for a writ of prohibition, restraining the Commission from further proceeding with or enforcing the award in so far as it purported to bind persons who were not members of the applicant union or employers of its members.