Appeal court overturns renewed-consultation order for Chalk River nuclear-waste facility

The Federal Court of Appeal has overturned an order requiring renewed Indigenous consultation over a proposed radioactive-waste disposal facility at Chalk River, ruling that federal legislation on the United Nations Declaration on the Rights of Indigenous Peoples did not impose the additional obligations asserted in this case.

In Canadian Nuclear Laboratories Ltd. v. Kebaowek First Nation, 2026 FCA 174, released October 16, 2026, a unanimous panel allowed Canadian Nuclear Laboratories’ appeal and dismissed Kebaowek’s application for judicial review. The Canadian Nuclear Safety Commission’s construction approval remains in place.

Justice Webb, writing with Justices Monaghan and Pamel concurring, stressed that the appeal did not concern whether consultation was required at all. The question was whether the 2021 United Nations Declaration on the Rights of Indigenous Peoples Act added obligations beyond the existing duty to consult and accommodate.

A proposed replacement for older waste-storage practices

Canadian Nuclear Laboratories operates the Chalk River Laboratories site, which belongs to federal Crown corporation Atomic Energy of Canada Limited. The site borders the Ottawa River and has generated radioactive waste for more than 75 years.

The proposed near-surface disposal facility would accommodate up to one million cubic metres of solid low-level radioactive waste. The reasons describe existing storage practices as ineffective at preventing long-term contaminant migration and inconsistent with modern waste-management principles.

Kebaowek is an Algonquin Anishinabeg First Nation based on Lake Kipawa in Quebec. The court explained that the site lies within its broader traditional territory, but outside and adjacent to the area covered by its outstanding Aboriginal title claim. The lands were expropriated in the 1940s, and access has been restricted since then.

In January 2024, the Commission approved a licence amendment permitting construction. It found that consultation obligations had been discharged and that the project was unlikely to cause significant adverse environmental effects if the proposed mitigation measures were implemented.

What the earlier ruling required

Kebaowek challenged that decision in Federal Court. In 2025 FC 319, the court required renewed consultation directed toward implementing the declaration’s free, prior and informed consent standard, including a process adapted to Indigenous laws, knowledge and practices and aimed at reaching agreement.

That ruling did not cancel the Commission’s approval. Canadian Nuclear Laboratories appealed the consultation order, while Kebaowek cross-appealed seeking to have the approval itself set aside.

Kebaowek argued that the declaration was an important contextual factor in assessing consultation and that the process should be directed toward obtaining consent. It relied on provisions addressing hazardous-material storage on Indigenous lands and projects affecting Indigenous lands or resources.

The appeal court treated the interpretation of the federal declaration legislation as a legal question of central importance requiring a correctness review, rather than deference to the Commission’s interpretation.

A framework for implementation

The central distinction in the reasons is between recognizing the declaration’s application in Canadian law and immediately implementing every article that is inconsistent with existing Canadian law.

The court held that the 2021 statute provides a framework and process for implementation. Section 5 requires the Government of Canada, working in consultation and cooperation with Indigenous peoples, to take the measures necessary to make Canadian laws consistent with the declaration. The statute also requires an action plan and reporting.

Those obligations contemplate further work, Justice Webb concluded. Parliament did not include a provision making the declaration automatically prevail whenever it conflicts with Canadian law. Instead, an inconsistency triggers the government’s obligation to take steps to resolve it.

The court considered the Supreme Court’s description, in its 2024 reference on Indigenous child and family services legislation (2024 SCC 5), of the declaration as incorporated into Canadian positive law, but read that statement alongside the framework, consultation and implementation obligations discussed in the same decision. It did not understand that description to mean that inconsistent articles had immediately displaced existing law.

The reasons also distinguished British Columbia legislation considered in Gitxaala. British Columbia has a specific interpretation provision requiring statutes and regulations to be construed consistently with the declaration; the federal Interpretation Act has no equivalent provision.

The Commission’s particular role

The court separately rejected the argument that the Commission, when deciding this construction application, was the Government of Canada for the purposes of section 5’s broader law-reconciliation obligation.

Kebaowek had pointed to the Commission’s executive powers, its status as a Crown agent and case law recognizing regulatory decisions as Crown action. Justice Webb held that those features did not answer the specific statutory question.

The Commission’s mandate concerns nuclear energy and nuclear substances. Section 5 contemplates a broader process of consultation and measures to reconcile Canadian laws with the declaration. The court confined its conclusion to the Commission’s role in approving this project, rather than giving an exhaustive definition of the Government of Canada.

Consultation duties and unresolved questions

Existing consultation law remained relevant. The reasons explain that its requirements vary with the strength of the asserted right or title and the seriousness of potential adverse effects.

In this case, Justice Webb placed the duty at the low end of that spectrum, relying on the absence of a title claim to the site itself and the lack of identified new adverse impacts beyond the historical taking. The court also noted that Kebaowek did not challenge, on this appeal, the Commission’s finding concerning significant adverse environmental effects.

The decision leaves important limits. The court raised questions about the declaration’s references to Indigenous lands and territories and the relationship between compensation for historical takings and continuing rights over those lands. It did not decide a compensation claim. Nor does the ruling remove the Crown’s existing consultation obligations or resolve how every declaration article applies in every setting.

The appeal was allowed with costs, and the Federal Court judgment was set aside. Kebaowek’s cross-appeal was dismissed without costs. Its underlying judicial-review application was dismissed with costs in Federal Court. The reasons do not fix the amounts.