Minister for Labour and Industry (NSW) v Mutual Life and Citizens' Assurance Company Limited

The Minister for Labour and Industry (NSW) appealed to the High Court of Australia from a decision of the Supreme Court of New South Wales. The dispute arose from a complaint lodged by the Minister against the Mutual Life and Citizens' Assurance Company Limited for allegedly failing to pay an employee the minimum living wage prescribed by regulations made under the Industrial Arbitration Act 1912 (NSW). The company argued that the magistrate lacked jurisdiction because the regulation did not apply to them and was ultra vires. The magistrate convicted the company, but the Supreme Court subsequently granted a writ of prohibition.

The central legal issue before the High Court was whether a common law writ of prohibition could lie against an order made by an industrial magistrate under the Industrial Arbitration Act 1912, particularly in light of section 55(4) of that Act, which stated that "no other proceedings in the nature of an appeal from any such order or by prohibition shall be allowed." The court was required to determine the scope of this exclusionary provision and whether it prevented recourse to prohibition even if the magistrate had exceeded their jurisdiction.

A majority of the High Court, comprising Knox C.J., Isaacs, Gavan Duffy, and Starke JJ., held that a common law writ of prohibition would not lie. Their reasoning was that section 55(4) of the Industrial Arbitration Act 1912, when read in conjunction with the Act's comprehensive scheme for industrial dispute resolution, effectively excluded any proceedings other than the statutory appeal to the Court of Industrial Arbitration or a case stated to that Court. They concluded that the magistrate's order, having been made in a complaint under the Act, was an "order under this Act" and thus subject to the exclusive remedies provided by section 55. Higgins J. concurred in allowing the appeal, but on the narrower ground that the magistrate's decision regarding the applicability and validity of the regulation, even if erroneous, was within their jurisdiction, and therefore prohibition would not lie irrespective of section 55(4).

Consequently, the High Court allowed the appeal, set aside the order of the Supreme Court, and discharged the rule nisi for prohibition. The appellant was ordered to pay the costs of the appeal.