Minister for Immigration and Ethnic Affairs v Teoh

The Minister for Immigration and Ethnic Affairs (the Minister) appealed to the High Court of Australia from a decision of the Federal Court of Australia. The appeal concerned the application of international conventions to Australian domestic law, specifically in relation to a deportation order made against Mr. Teoh, a Malaysian national who had been convicted of drug offences in Australia. Mr. Teoh had entered Australia as a temporary resident and subsequently married an Australian citizen, with whom he had a child. The Minister sought to deport Mr. Teoh pursuant to s 501 of the Migration Act 1958 (Cth).

The central legal issue before the High Court was whether the Minister, when exercising the discretion to deport Mr. Teoh under s 501 of the Migration Act, was required to take into account the best interests of Mr. Teoh's Australian child. This question hinged on whether Australia's ratification of the United Nations Convention on the Rights of the Child (the Convention) had the effect of creating a legitimate expectation that the best interests of a child would be considered in administrative decision-making processes that affected them, even in the absence of express statutory provision.

The High Court, by a majority, held that the ratification of an international convention by Australia does not, of its own force, give rise to rights enforceable in Australian domestic law. However, the Court found that where a statute is ambiguous, or where its terms permit, the courts will favour an interpretation that accords with Australia's treaty obligations. In this instance, the Court determined that the Minister's discretion under s 501 of the Migration Act was broad enough to permit, and indeed require, consideration of the best interests of Mr. Teoh's child. The Court reasoned that the Convention, by its nature, created a legitimate expectation that its provisions would be considered by administrative decision-makers.

The High Court allowed the appeal, quashed the decision of the Federal Court, and remitted the matter to the Minister for reconsideration in accordance with the reasons of the Court. This meant that the Minister was required to take into account the best interests of Mr. Teoh's child when deciding whether to grant a waiver of the deportation requirement.