CSR Ltd v Cigna Insurance Australia Ltd

The High Court of Australia considered appeals from the Court of Appeal of the Supreme Court of New South Wales concerning applications for interlocutory anti-suit injunctions. The dispute involved proceedings commenced in Australia by CSR Ltd and others (the appellants) against Cigna Insurance Australia Ltd (the respondent), which the appellants sought to restrain from continuing proceedings in the United States.

The central legal issues before the High Court were the principles governing the grant of interlocutory anti-suit injunctions, the nature and sources of the jurisdiction to grant such injunctions, and whether the foreign proceedings were vexatious or oppressive according to equitable principles. The Court also had to determine whether a prior application for a stay or dismissal of the foreign proceedings was necessary, the relationship between anti-suit injunctions and stays of proceedings on *forum non conveniens* grounds, and whether the principles applicable to interlocutory injunctions generally applied to interlocutory anti-suit injunctions.

The High Court reasoned that the jurisdiction to grant an anti-suit injunction arises from the equitable jurisdiction of the court to restrain a party over whom it has personal jurisdiction from commencing or continuing proceedings in a foreign court where it would be vexatious or oppressive to do so. The Court held that the dominant purpose of the Australian proceedings was to prevent the appellants from pursuing remedies available only in the United States. Applying the principles of *forum non conveniens*, the Court found that the Australian proceedings were vexatious and oppressive, and that the controversy as a whole was more appropriately dealt with in the United States.

The High Court allowed the appeals, setting aside the orders of the Court of Appeal. The applications for anti-suit injunctions were dismissed, and the Australian proceedings were stayed pending the outcome of the proceedings in the United States District Court for the District of New Jersey. The parties were granted liberty to apply to the Supreme Court of New South Wales to lift or vary the stay.