Peter Neil Slipper v Magistrates Court of the Act and Michael Turner and Commonwealth Director of Public Prosecutions

The case of Peter Neil Slipper v Magistrates Court of the ACT and Michael Turner and Commonwealth Director of Public Prosecutions involved the former speaker of the House of Representatives, Mr. Peter Slipper, challenging the Magistrates Court's refusal to permanently stay criminal proceedings against him. These proceedings arose from the alleged misuse of Cabcharge vouchers, which Slipper claimed were for parliamentary business. The case reached the High Court, which was required to determine whether the criminal proceedings against Mr. Slipper were unfair due to Section 16 of the Parliamentary Privileges Act 1987 (Cth), which grants exclusive cognisance of parliamentary business to the Parliament.

The central legal issue was whether the term "proceedings in Parliament" in Section 16 of the Act was broader than "parliamentary business." The court was also required to decide whether Section 16 precluded Slipper from adducing evidence that he was travelling on parliamentary business when the alleged misuse occurred. Moreover, the court had to determine whether Section 16(3) applied, which allows the court to receive evidence to make this determination.

The High Court held that the term "proceedings in Parliament" was narrower than "parliamentary business," and therefore the criminal proceedings against Mr. Slipper were not automatically unfair. The court found that Section 16 did not preclude Slipper from adducing evidence that he was travelling on parliamentary business. However, the court concluded that the claim of parliamentary privilege did not engage Section 16(3), and thus the application for judicial review was dismissed. The court's decision hinged on the interpretation of "proceedings in Parliament" and the scope of parliamentary privilege as it applied to the facts of this case.

The final orders of the court were that the application for judicial review be dismissed, thereby upholding the Magistrates Court's decision to proceed with the criminal proceedings against Mr. Slipper.