Koroitamana & Anor v Commonwealth of Australia & Anor

The applicants, Koroitamana and another, brought proceedings against the Commonwealth of Australia and another party in the High Court of Australia. The dispute concerned the validity of certain decisions made by the respondents.

The High Court was required to determine whether the decisions of the respondents were invalid by reason of the operation of s 474.15 of the *Migration Act 1958* (Cth), which renders certain decisions invalid if they are made in contravention of a non-compellable duty of disclosure. The applicants contended that the respondents had failed to disclose relevant information to them, thereby breaching such a duty and rendering the decisions invalid.

The Court considered the nature of the duty of disclosure in administrative decision-making, particularly in the context of the *Migration Act*. It examined the circumstances in which a duty of disclosure might arise and the consequences of its breach under s 474.15. The Court analysed the specific facts of the case to ascertain whether the respondents' conduct amounted to a contravention of a non-compellable duty of disclosure as contemplated by the legislation.

The High Court ultimately found that the applicants had not established that the respondents had contravened a non-compellable duty of disclosure. Accordingly, the Court dismissed the application.