Quebec Superior Court Grants Intervener Status in Challenge Against Federal Bill C-5

The Quebec Superior Court has granted nine environmental, scientific, and human rights organizations the right to intervene in a legal challenge against the federal Loi sur les projets d’intérêt national (Bill C-5). According to a joint statement released by the organizations on Friday, the court will allow these groups to present arguments regarding the law’s potential impact on the environment, scientific integrity, and human rights.

What is the legal challenge against Bill C-5?

The Centre québécois du droit de l’environnement (CQDE), a legal organization specializing in environmental law, filed a formal challenge against Bill C-5 in September 2024. The legislation, which was adopted in June 2025, aims to accelerate the approval process for major industrial projects—such as mines, pipelines, and ports—by capping review timelines at two years. The CQDE argues that the law grants the federal government excessive discretionary power, which it contends undermines environmental protections and democratic oversight.

Which organizations will intervene in court?

The court permitted nine of the 11 organizations that requested intervener status to participate in the proceedings. These groups include:

• Association des biologistes du Québec
• Amnistie internationale Canada francophone
• Équiterre
• Greenpeace Canada
• Institut de l’Énergie Trottier
• MiningWatch Canada
• Nature Québec
• Regroupement des organismes environnementaux en énergie
• SNAP Québec

Geneviève Paul, executive director of the CQDE, stated that these groups bring essential field experience and scientific expertise that will assist the court in evaluating the legal implications of the government’s new regulatory framework.

Why were some organizations denied?

The Quebec Superior Court denied intervener status to the Canadian Association of Physicians for the Environment and the David Suzuki Foundation. According to the CQDE, the court determined that the specific arguments these organizations intended to present—focusing on public health outcomes and barriers to public participation—were too far removed from the core legal questions already established in the primary challenge. In a joint statement, the two organizations expressed regret that their specific perspectives on the law’s impact on population health would not be heard directly by the court.

Context of the legislation

The federal government introduced Bill C-5 as a strategic response to evolving trade pressures and the shifting economic relationship between Canada and the United States. By streamlining the environmental assessment process, the government aims to ensure that major infrastructure projects can proceed under an accelerated timeline, a move it frames as essential for national economic interest. As the case moves forward, the court is currently in discussions with the parties involved to finalize the schedule for future hearings.

Key Takeaways

• Legal Status: Nine organizations are now authorized to provide “amicus curiae” or “friend of the court” testimony in the CQDE’s challenge.
• Core Dispute: The challenge centers on whether a two-year hard cap on industrial project approvals compromises environmental safety and democratic processes.
• Exclusions: The court narrowed the scope of the proceedings by excluding arguments centered strictly on public health impacts at this stage of the litigation.