Executive Summary: Key Legal and Evidentiary Issues

• Constitutionality of Ontario’s 2017 back-to-work legislation (Bill 178) ending a college faculty strike under s. 2(d) of the Charter (freedom of association).
• Scope of the right to strike as an essential component of meaningful collective bargaining and whether terminating a lawful strike inevitably amounts to substantial interference.
• Whether Ontario established a pressing and substantial objective—protecting students from losing their academic year and related harms—to justify the limit under s. 1 of the Charter.
• Proportionality analysis of Bill 178, including rational connection, minimal impairment, and the balance of salutary and deleterious effects on collective bargaining rights.
• Adequacy of binding interest arbitration under Bill 178 as a “meaningful alternative mechanism” to resolve the bargaining impasse in place of continued strike action.
• Weight and sufficiency of social science and factual evidence about harms to students versus the impact on OPSEU members’ bargaining leverage, including the timing of the government’s ultimatum and legislative intervention.

Factual background and bargaining context
In 2017, the Ontario Public Service Employees Union (OPSEU) represented full-time academic employees (faculty) at Ontario’s 24 colleges of applied arts and technology. Collective bargaining between OPSEU and the College Employer Council (the Council), the statutory employer bargaining agency under the Colleges Collective Bargaining Act, 2008 (CCBA), began in July 2017. The CCBA incorporates portions of the Labour Relations Act, 1995 and assigns certain responsibilities to the Ontario Labour Relations Board, providing the legislative framework for bargaining and strikes in the college sector.
The parties reached agreement on some issues but stalled over three key OPSEU proposals: the creation of an academic senate at each college, a contractual guarantee of academic freedom for faculty, and a reduction in the number of part-time faculty. The Council resisted the academic senate and academic freedom proposals on the basis that they would fundamentally alter governance structures and academic decision-making in a manner inconsistent with the existing statutory scheme governing the colleges. Conciliation failed, and on October 16, 2017, OPSEU commenced a lawful strike, which led to an immediate cessation of student instruction across the college system.
Ontario internally took the position that a strike lasting six weeks would compromise the academic term. Although this threshold was never communicated to OPSEU during the strike, OPSEU’s counsel later accepted that, at some point, the term would be jeopardized and did not suggest that the six-week marker was unreasonable or offer an alternative timeframe.

Escalation of the dispute and government intervention
On November 6, 2017, both OPSEU and the Council tabled settlement offers. The Council characterized its offer as final and requested, pursuant to s. 17(2) of the CCBA, that the Ontario Labour Relations Board conduct a vote by OPSEU’s members. That vote took place from November 14 to 16, 2017, and 86% of participating members rejected the Council’s offer, which OPSEU viewed as a significant boost to its bargaining momentum.
On November 16, 2017, the parties met with then-Premier Kathleen Wynne. The Premier advised that Ontario would use “all of the tools at [its] disposal” if a deal was not reached by 5 p.m. that day. No agreement materialized, and the Council reported to the government that the parties were deadlocked. Later on November 16, Ontario announced its intention to introduce back-to-work legislation.

Enactment of Bill 178 and imposition of interest arbitration
Bill 178, the Colleges of Applied Arts and Technology Labour Dispute Resolution Act, 2017, received Royal Assent on November 19, 2017, after five weeks of strike activity. The statute terminated the strike, compelled faculty to return to work, and mandated that all outstanding bargaining issues be resolved through binding interest arbitration. The legislation did not dictate specific collective agreement terms but set out a neutral arbitration framework intended to mirror, as closely as possible, the scope of outcomes achievable through standard collective bargaining.
On December 20, 2017, the arbitrator issued an award that prescribed the terms of a new collective agreement covering the period from October 1, 2017, to September 30, 2021. The arbitration outcome was characterized as a “historic” achievement for OPSEU in terms of the resulting collective agreement, underscoring that significant gains remained possible despite the legislated end to strike activity.

Constitutional challenge to Bill 178
OPSEU brought a constitutional application seeking: (1) a declaration that Bill 178 infringed its members’ freedom of association, specifically the right to strike as part of meaningful collective bargaining, contrary to s. 2(d) of the Canadian Charter of Rights and Freedoms; (2) a declaration under s. 52 of the Constitution Act, 1982 that Bill 178 was of no force and effect; and (3) damages under s. 24(1) of the Charter.
The application judge, applying the Supreme Court’s 2015 labour trilogy and related jurisprudence, concluded that the legislation did not substantially interfere with meaningful collective bargaining. He reasoned that the parties had reached an impasse and that imposing a neutral arbitration mechanism at that stage did not amount to a constitutionally significant intrusion into the bargaining process. On that basis, he found no limit on s. 2(d) and, in any event, held that Bill 178 was justified under s. 1. The application was dismissed.

The appeal: recognition of a rights infringement
On appeal, the Ontario Court of Appeal revisited the analytical framework, drawing heavily on its own recent authority in Amalgamated Transit Union, Local 113 v. Ontario (TTC). The court emphasized that, under Saskatchewan Federation of Labour v. Saskatchewan, the right to strike is an “essential part of a meaningful collective bargaining process” rather than a peripheral tool. In TTC, the court had held that a complete ban on strikes after the expiry of a collective agreement “will invariably” substantially interfere with s. 2(d) collective bargaining rights, obviating the need for a case-specific inquiry into actual bargaining effects.
The Court of Appeal extended that logic to back-to-work legislation that terminates a lawfully commenced strike. By legislatively ending a legal strike and prohibiting strike action for the remainder of the bargaining process, Bill 178 necessarily and substantially interfered with meaningful collective bargaining by removing a “necessary component” of the process—the ability to engage in a collective work stoppage. Even though the prohibition was temporally limited, the court held that the restriction on striking for the duration of the bargaining round amounted to a limit on a protected activity under s. 2(d).
Accordingly, the appellate court found that the application judge erred in concluding there was no s. 2(d) infringement. It held that Bill 178 did limit OPSEU members’ freedom of association, thereby requiring a full s. 1 justification analysis.

Section 1 analysis: pressing objective and rational connection
Turning to s. 1, the court accepted the application judge’s identification of Bill 178’s legislative objective: resuming classroom instruction at Ontario’s 24 colleges and mitigating the harm to students caused by a prolonged strike. The evidentiary record showed that Ontario sought to minimize the risk to the academic term, preserve students’ ability to complete their programs, protect professional accreditation timelines, and avoid serious financial and personal disruptions, including impacts on employment prospects and living expenses.
The court characterized the first Oakes step—the existence of a pressing and substantial objective—as typically non-adversarial and focused on whether the government has articulated a sufficiently important goal rather than conclusively proven every harm. In this context, avoiding widespread academic, economic, and professional harm to hundreds of thousands of students was clearly capable of justifying some limitation on the right to strike.
On rational connection, the court agreed with the application judge that legislating an end to the strike and referring unresolved issues to interest arbitration was logically connected to the goal of resuming instruction and salvaging the academic year. Ending the strike was a direct and effective means to avert the identified harms to students.

Minimal impairment: deference in a complex policy setting
The Court of Appeal then addressed minimal impairment. It reiterated that legislatures are not required to adopt the absolutely least restrictive measure but must choose an option within a range of reasonably tailored alternatives that limit Charter rights no more than necessary. This is particularly so where complex social policy and labour-relations trade-offs are involved, warranting substantial deference to legislative judgment about how to reconcile competing interests.
The application judge had found that Bill 178 satisfied minimal impairment because it replaced the right to strike with an “impartial and effective” interest arbitration process that provided a fair, expeditious, and neutral means of resolving the dispute. The appellate court endorsed this approach, noting that the arbitration model did not dictate outcomes, did not skew the process toward one side, and did not replicate the procedural flaws that had rendered earlier postal-sector back-to-work legislation unconstitutional in Canadian Union of Postal Workers v. Her Majesty in Right of Canada (CUPW 2016).
OPSEU argued that the timing of the government’s ultimatum and introduction of Bill 178—about a week before the government’s own six-week “tipping point”—made the law more intrusive than necessary and that interest arbitration risked a chilling or narcotic effect on collective bargaining in future rounds. The Court of Appeal rejected these arguments. It held that debating whether the legislation should have waited one more week amounted to micro-managing a policy decision that lies squarely within governmental competence. On the record, there was no demonstrated pattern of reliance on arbitration in the college sector or evidence that the prospect of arbitration had undermined bargaining dynamics in a way that would render Bill 178 more than minimally impairing.

Proportionate effects: balancing student harm and bargaining rights
At the final, “proportionate effects” stage, the court examined whether the overall benefits of Bill 178 justified the rights limitation in a free and democratic society. The application judge had relied on evidence that the strike had paused the education of hundreds of thousands of students and risked their ability to complete the academic term and year, with substantial consequences for living costs, child care, professional fees, debt servicing, summer and co-op employment opportunities, and eligibility for professional licensing. He found it self-evident that a lengthy strike would have severe adverse effects and accepted expert testimony that the key harm was the immediate risk of losing a school year.
OPSEU contended that the judge had discounted the deleterious impact on its members’ bargaining leverage and had improperly accepted the government’s evidence of harm without insisting on rigorous social-science proof. The Court of Appeal disagreed. It held that where social-science evidence is inconclusive or contested, courts may rely on a “reasoned apprehension of harm” and are not confined to statistically definitive studies. The extensive correspondence from students, coupled with expert analysis and the sheer scale of the disruption, provided a sound basis for the government’s concern and the court’s findings.
On the union side, the court recognized that legislatively terminating a legal strike constituted a significant interference with a core collective bargaining tool. However, that interference was time-limited, addressed a specific impasse, and was mitigated by the provision of a neutral, robust interest arbitration mechanism that left all substantive outcomes on the table. The arbitration process produced a collective agreement that was, by all accounts, highly favourable for OPSEU, underscoring that the statutory scheme did not deprive the union of the opportunity to secure meaningful gains.
Weighing the competing considerations, the court concluded that Ontario’s objective of protecting students and preserving the academic year, coupled with the tailored use of back-to-work legislation and neutral arbitration, meant that the salutary effects of Bill 178 outweighed its deleterious effects on OPSEU members’ associational rights. The infringement of s. 2(d) was therefore demonstrably justified under s. 1.

Outcome and monetary order
In the result, the Ontario Court of Appeal allowed OPSEU’s argument to the limited extent of recognizing that Bill 178 did, in fact, limit the right to strike protected under s. 2(d), but it ultimately upheld the legislation as a reasonable and demonstrably justified limit in the circumstances. The court dismissed OPSEU’s appeal from the application judge’s decision and left Bill 178 in force, confirming the validity of the legislated end to the strike and the interest arbitration award that followed.
Ontario, as the respondent and successful party, obtained an order for costs fixed in the amount of $50,000, payable by OPSEU. No damages were awarded to any party, and no costs were ordered in favour of the interveners. Apart from this quantified costs award, there were no additional monetary awards or damages specified, so the total monetary amount ordered in favour of the successful party was $50,000 in costs only.