Attorney-General of the Commonwealth v Collaery & Anor

The Attorney-General of the Commonwealth sought to restrain Mr Bernard Collaery and Mr Bernard Collaery (a legal practitioner) from disclosing certain information relating to the Timor Sea Treaty negotiations. The Attorney-General contended that the disclosure of this information would breach confidentiality obligations owed to the Commonwealth and potentially endanger Australia's international relations. The matter came before the High Court of Australia.

The central legal issue before the High Court was whether the Attorney-General was entitled to an interlocutory injunction to restrain the respondents from disclosing the information. This required the Court to consider the principles governing the grant of such injunctions, particularly in circumstances involving alleged breaches of confidence and potential harm to international relations. The Court also had to determine whether the public interest in the disclosure of the information, if any, outweighed the public interest in maintaining the confidentiality of government communications.

The High Court ultimately dismissed the Attorney-General's application for an interlocutory injunction. The Court reasoned that the Attorney-General had not established a sufficient likelihood of success on the merits of the claim for breach of confidence. Specifically, the Court found that the information in question was not confidential in the manner required to found such a claim, and that the public interest in disclosure, particularly given the nature of the information and the context of its potential dissemination, was a significant factor. The Court emphasised that the threshold for granting an interlocutory injunction requires a strong prima facie case, which had not been met.