R v Cohen; Ex parte

The case of *R v Cohen; Ex parte* concerned an application for a writ of prohibition brought by the applicant, Cohen, against the respondent, a magistrate. The dispute arose from proceedings before the magistrate concerning alleged contraventions of the *Prices Justification Act 1973* (Cth). Cohen sought to prohibit the magistrate from continuing these proceedings.

The central legal issue before the High Court of Australia was whether the magistrate had jurisdiction to hear and determine the charges laid against Cohen under the *Prices Justification Act*. Specifically, the Court had to consider whether the Act, and the regulations made under it, were validly enacted and enforceable, particularly in light of potential constitutional challenges.

The Court ultimately held that the *Prices Justification Act* and its associated regulations were constitutionally valid. The reasoning focused on the interpretation of the Commonwealth's legislative power, particularly in relation to trade and commerce. The Court found that the Act fell within the scope of the Commonwealth's powers and that the magistrate therefore possessed the necessary jurisdiction to proceed with the hearing.

Consequently, the application for a writ of prohibition was dismissed.