The High Court of Australia took a fresh constitutional challenge on the government’s post-NZYQ immigration control regime in early October 2025. Specifically, numerous non-citizens released from indefinite detention last year challenged the legality of the restrictive visa provisions in accordance with Migration Amendment (Bridging Visa Conditions) Ministerial Direction No. 92 (2024) of Australia. These conditions, imposed on non-citizens released after NZYQ—many of whom had previously been detained for years because their removal was not practicable—include electronic ankle bracelets, nightly curfews, and mandatory reporting to authorities. Although described as “community supervision,” these measures are said by the applicants as constituting de facto detention—a disguised continuation of the unconstitutional practice that NZYQ v Minister for Immigration [2023] HCA 37 highlighted.

The new case signals the “second front” in Australia’s detention jurisprudence. In NZYQ, the High Court held that indefinite administrative detention of non-citizens was unconstitutional once removal from Australia was no longer practically possible. That decision, delivered in November 2023, overturned nearly two decades of precedent and prompted the release of more than 140 people. In response, the government swiftly enacted new legislative controls designed to maintain surveillance and containment over those released, without formally reincarcerating them.

The constitutional issue now before the Court is whether such coercive visa conditions cross the line between regulation and detention. If this new regime restricts people’s freedom, it might once again breach Chapter III of the Australian Constitution, which reserves the exercise of judicial power—including the power to impose detention—for the courts. Therefore, the difficulty strikes at the heart of Australia’s separation of powers: will the executive, in the name of “risk management,” impose restrictions equivalent to imprisonment without judicial consent?

This question reveals a unique constitutional landscape in Australia. Since a national human rights charter does not exist, there is no express constitutional right to liberty. Human freedom is protected structurally through the rule that only courts can order detention. In NZYQ, the High Court applied that principle to ascertain that administrative detention ceased to be lawful once its statutory purpose—to assist deportation—could no longer be met. Whether the logic applies to a post-detention regime in the form of intensive monitoring rather than physical confinement will be a matter of judicial consideration ahead.

The question is not only the reach of executive power but the meaning of liberty itself. The government defends its measures as necessary to protect the community from non-citizens with criminal histories. The plaintiffs counter that constitutional limits cannot be overridden by administrative convenience. As the High Court has emphasised, the Constitution does not permit the executive to achieve indirectly what it is prohibited from doing directly.

From a global standpoint, the controversy extends well beyond Australia’s borders. Article 9 of the International Covenant on Civil and Political Rights (“ICCPR”) guarantees freedom from arbitrary detention. The UN Human Rights Committee’s decision in A v Australia (1997) had previously found Australia’s mandatory immigration detention regime to be in breach of that provision. The return of detention-like controls—now known as “supervision”—gives rise to familiar problems of compliance with responsibilities imposed by the international community.

Comparable struggles are visible across jurisdictions. The United Kingdom’s Rwanda deportation scheme and the United States’ ICE detention practices both test the limits of executive discretion in the realm of migration control. Australia’s current litigation thus contributes to a global dialogue about how liberal democracies reconcile border management with constitutional and human rights norms.

As the High Court prepares its judgment, the stakes could not be higher. If it recognises that coercive supervision can amount to a deprivation of liberty, it will reaffirm the judiciary’s central role in safeguarding rights through constitutional structure rather than statutory charters. If not, Australia may witness the quiet reconstitution of indefinite detention under another name. Either way, the outcome will shape not only the future of Australian constitutionalism but also the global understanding of freedom in an age of securitised migration governance.