Leghaei v Director-General of Security

In *Leghaei v Director-General of Security*, the applicant, Mr. Leghaei, sought to challenge the decision of the Director-General of Security (the respondent) to refuse to grant him a security clearance. This refusal was based on the respondent's assessment that Mr. Leghaei posed a security risk to Australia. The matter came before Hayne J of the High Court of Australia.

The central legal issue before the Court was whether the Director-General of Security had acted unlawfully in refusing to grant Mr. Leghaei a security clearance. This involved an examination of the scope of the Director-General's powers and the procedural fairness owed to an individual in such circumstances, particularly concerning the use of information that could not be disclosed to the applicant.

Hayne J considered the provisions of the *Australian Security Intelligence Organisation Act 1979* (Cth) and the common law principles of procedural fairness. His Honour noted that while procedural fairness generally requires an opportunity to be heard, this principle can be modified or displaced in exceptional circumstances, such as where the disclosure of information would be contrary to the public interest, particularly in matters of national security. The Court ultimately found that the Director-General had acted within his powers and that the refusal of the security clearance was lawful, notwithstanding the limitations on Mr. Leghaei's ability to know or respond to all the information relied upon by the respondent.