Amalgamated Society of Carpenters and Joiners v Haberfield Pty Ltd

The High Court of Australia heard an appeal from the Supreme Court of New South Wales concerning a decision of the Arbitration Court of New South Wales. The dispute arose when the Amalgamated Society of Carpenters and Joiners (the appellant) prosecuted Haberfield Pty Ltd (the respondent) for breaches of a common rule established under the Industrial Arbitration Act 1901 (NSW). The common rule, derived from an award, stipulated a minimum daily wage for carpenters. The respondent contended that the Arbitration Court lacked jurisdiction because the individuals performing the work were independent contractors, not employees, and therefore the respondent was not bound by the common rule.

The central legal issue before the High Court was whether the Supreme Court was correct in granting a prohibition against the Arbitration Court. This required determining whether the Arbitration Court had exceeded its jurisdiction by finding that the relationship between the respondent and the workmen was one of employer and employee, despite the respondent's contention that they were independent contractors. The High Court had to consider the principles governing the jurisdiction of courts of limited statutory authority and the circumstances under which their decisions could be reviewed by prohibition.

The High Court, allowing the appeal, reasoned that the Arbitration Court, in hearing a charge of breach of a common rule, was competent to inquire into all elements of the alleged offence. One such element was whether the respondent was an employer and had entered into a contract of employment. The Court held that even if the Arbitration Court's decision on the nature of the relationship between the respondent and the workmen was erroneous, either in law or in fact, this did not constitute an excess of jurisdiction that would warrant prohibition. The Court applied the principle that an erroneous decision on a point which the court is competent to try is not a ground for prohibition, distinguishing this from a situation where a court attempts to give itself jurisdiction by an incorrect decision on a preliminary question upon which its jurisdiction depends.

Consequently, the High Court reversed the decision of the Supreme Court, finding that the Supreme Court had erred in granting prohibition. The Arbitration Court had jurisdiction to determine whether the respondent was an employer and had breached the common rule, and its decision on this matter, however mistaken, was not subject to review by prohibition.