Defamation Law in the Northern Territory: The 2025 Reforms

The Northern Territory went straight from the unamended Defamation Act 2006 to the full national reform package in a single Act, commencing 11 August 2025, the only jurisdiction to adopt both reform stages at once.

This article addresses defamation law in the Northern Territory under the Defamation Act 2006 (NT), as amended with effect from 11 August 2025. It compares the Territory's position to the rest of Australia, covered on the Australian defamation law hub.

A Separate Act, and a Late, All-at-Once Reform

The Northern Territory is governed by its own Defamation Act 2006, a different Act from the "Defamation Act 2005" that New South Wales, Victoria, Queensland, South Australia, Tasmania and Western Australia each separately enacted. Because it is a separate Act, its section numbers were never going to automatically match the others, and they do not, as the sections below show. More unusually, the Northern Territory did not adopt Stage 1 in 2021 alongside most of the country, or Stage 2 in the 2023-2025 window most other jurisdictions used. It adopted both reform packages together, in a single amending Act, commencing 11 August 2025. Before that date, the NT ran essentially the original, pre-reform 2006 Act, meaning it was for several years the second jurisdiction, after Western Australia, operating outside the national reform framework, until it closed that gap in one step rather than two.

Serious Harm: Section 9A, Not Section 10A

Since 11 August 2025, the NT has a serious harm element of the cause of action for defamation, requiring a plaintiff to show the publication caused, or was likely to cause, serious harm to their reputation, mirroring the substance of the rule described on the serious harm threshold in Australia. The section number is different from the NSW model, however: it is s 9A of the Defamation Act 2006 (NT), not s 10A. A reader citing the NT's serious harm provision by the NSW section number will cite the wrong section.

Concerns Notices: Sections 11A and 11B

The NT's mandatory concerns notice precondition is likewise substantively similar to the rest of the country but numbered differently: it sits at s 11A (concerns notices) and s 11B (proceedings cannot be commenced without a concerns notice), not ss 12A-12B as in New South Wales and several other jurisdictions. Since 11 August 2025, an aggrieved person in the Territory cannot commence defamation proceedings without first giving a valid concerns notice and waiting out the applicable period, generally 28 days, under this numbering. See concerns notices in Australia for how the requirement works in substance.

Digital Intermediaries: Adopted, at Section 28A

The NT adopted the Stage 2 digital intermediary framework in the same commencement as everything else, on 11 August 2025. It has exemptions for intermediaries with purely technical caching, conduit or storage roles and for search engines over organic results, inserted in its own Division 2A at ss 9B-9E, and a complaints-based innocent dissemination defence for digital intermediaries, but that defence sits at s 28A among the Territory's defences, a different position from the s 31A numbering used in the NSW model. A court in the NT can also order a non-party digital intermediary to prevent access to defamatory digital matter, under s 36A, once an injunction against the primary publisher has issued. See online defamation in Australia for how this compares to South Australia's partial adoption of the same package.

Damages Cap: Section 32(3), and a Stale Government Webpage

The Territory's damages cap sits at s 32 of the Defamation Act 2006 (NT), not s 35. Structurally it mirrors the rest of the country: a base figure of $250,000 in 2005, indexed annually against average weekly earnings and rounded to the nearest $500, reserved for the most serious case, with aggravated damages awarded separately under s 32(2A)-(2B) and not limited by the cap. The current figure reached $520,000 from 1 July 2026, verified against Northern Territory Government Gazette S49 (29 June 2026), the same figure that applies in every other Australian jurisdiction. Do not, however, cite the Northern Territory Attorney-General's Department webpage listing this figure. As at this article's verification date, that page still states $478,500, a figure that is two full financial years stale. The Territory's own gazette, not that webpage, is the authoritative current source. See defamation damages in Australia for the section number and current figure in every jurisdiction.

Before 11 August 2025: What NT Law Looked Like

For the years between the rest of the country's Stage 1 reforms in 2021 and the Territory's own reform commencing 11 August 2025, the Northern Territory sat in a similar position to Western Australia: no serious harm threshold, no mandatory concerns notice, no public interest or peer review defence, and its own version of the old triviality defence still available. A publication made in the Northern Territory during that window would have been assessed under the unreformed 2006 Act, not the reformed rules described elsewhere on this site, even though most of the country had already moved on. A person dealing with a publication from that period needs to identify precisely when it occurred relative to 11 August 2025, because the applicable law genuinely differs on either side of that date.

How the NT Now Compares to Western Australia

Since 11 August 2025, the Northern Territory and Western Australia are no longer in the same position. The Territory has closed the gap entirely, adopting both reform stages in one step, while Western Australia remains the sole jurisdiction that has adopted neither. A reader comparing the two should not assume they still track together; the NT's substantive rules now closely resemble New South Wales and Victoria, just under different section numbers, while Western Australia's rules remain the original 2005 position throughout. See defamation law in Western Australia for the contrast.

What the NT Reform Did Not Change

Not everything in the Territory's defamation law moved with the 11 August 2025 reform. The core cause of action, the tort of defamation itself, the abolition of the distinction between slander and libel, and the underlying defences of justification, contextual truth, absolute privilege, publication of public documents, fair report and qualified privilege, all existed under the original 2006 Act and continue substantially unchanged, just renumbered where a new provision was inserted ahead of them. The excluded corporation rule for who can sue, covered on the Australian defamation law hub, likewise applied under the pre-reform Act and continues to apply now. The 11 August 2025 changes added new elements and new protections; they did not rebuild the Territory's defamation law from the ground up.

A Note on the Reform's Timing Relative to the Rest of the Country

By the time the Northern Territory's reforms commenced, New South Wales, Victoria, Queensland, South Australia, Tasmania and the ACT had all been operating under Stage 1 for roughly four years, and most of them under at least part of Stage 2 for one to two years as well. This makes the Territory's all-at-once approach easier to understand as a deliberate catch-up exercise rather than a staged rollout: rather than legislating Stage 1 late and Stage 2 later still, the Territory's Parliament combined both packages once it moved to legislate at all. Anyone tracking the national reform position going forward should treat the Northern Territory and Western Australia as separate cases, not a single "the two territories haven't reformed" story; as of 11 August 2025, only Western Australia fits that description.

This article provides general legal information about defamation law in the Northern Territory, verified 20 July 2026. It is not legal advice about your own situation. For advice, consult a legal practitioner admitted in the relevant Australian state or territory.

Related reading: the Australian defamation law hub, the serious harm threshold, concerns notices, online defamation, and defamation damages in Australia.