Migration advisers clarify Australia’s new Section 84B ‘Arrival Control Determination’ powers

Immigration advisers have spent the past 24 hours fielding anxious calls from clients worried that a new power in the Migration Act—Section 84B, known as an “Arrival Control Determination” (ACD)—might suddenly bar temporary-visa holders from boarding flights to Australia. In a detailed explainer shared on 20 March by registered migration agent Joe TheRMA on the r/AusVisa forum, advisers stressed that the power is **now law but has not yet been invoked**.



Travellers and corporate mobility teams looking for up-to-date guidance on Australian entry requirements can also draw on VisaHQ’s online tools and expert support. The platform—accessible at https://www.visahq.com/australia/—tracks regulatory changes in real time and helps applicants verify visa validity, explore alternative categories, and manage document submission with minimal hassle.

The amendment allows the Home Affairs minister, with written concurrence from the prime minister and foreign minister, to impose a time-limited pause on specified visa subclasses or nationalities if an international crisis triggers a sudden surge of applications or arrivals. Unlike a visa cancellation, the pause would simply suspend travel until the ACD expires, after which the visa remains valid for its original period. Section 84B was introduced after the Middle-East conflict and other global flashpoints highlighted gaps in Australia’s ability to act quickly without processing thousands of individual cancellations. While the government already has broad cancellation powers at the border, the new mechanism is designed for **class-wide, rapid responses** that reduce administrative burden on airlines and border officers. Advisers emphasise that the legislation builds in **significant exemptions**: it cannot be used against permanent-resident visa holders, on-shore temporary visa holders, immediate family members of citizens and PRs, most humanitarian arrivals, or anyone granted an individual exemption. Airlines would receive electronic notice via Advance Passenger Processing feeds and could refuse boarding to affected passengers during the pause. For businesses, the advice is to **review upcoming travel for assignees on temporary visas issued to citizens of conflict-affected regions**. Although the risk of an ACD being triggered remains low, mobility managers should build contingency buffers into travel plans and communicate to travellers that a visa grant does not guarantee entry until they clear immigration. Enterprises with large cohorts of student, visitor or short-term work-visa holders should also ensure HR and travel teams are ready to respond quickly to any ministerial instrument that might be issued under Section 84B.