Executive Summary: Key Legal and Evidentiary Issues

• Scope of an interest arbitrator’s mandate under Letters of Understanding (LOUs) providing for “final offer selection interest arbitration” and the required consideration of economic climate, competitive climate, and 2020 bargaining interests.
• Proper application of the Vavilov reasonableness standard on judicial review, and the limits on a court’s ability to reweigh evidence or substitute its own assessment of comparators and wage data.
• Interpretation of “competitive climate of the employer’s business” in the LOUs, and whether it requires prioritizing Alberta grocery competitors (especially Superstore) over other provincial or extra-provincial comparators.
• Evidentiary treatment of comparator collective agreements, including how much weight to give older agreements negotiated in a different economic environment versus more recent settlements in a high-inflation period.
• Role of the arbitrator’s labour-relations expertise in assessing the sufficiency of financial and comparator evidence, including in the absence of an express “inability to pay” case by the employer.
• Whether the chambers judge improperly converted interpretive and evidentiary disagreements into “jurisdictional” errors, masking a correctness review of the arbitrator’s decision instead of deferring to a reasonable outcome.

Background and parties
Sobeys Capital Incorporated is a large Canadian grocery retailer that owns and operates Safeway stores in Alberta. United Food and Commercial Workers, Local No. 401 (UFCW Local 401) represents roughly 6,334 unionized Safeway employees under three Safeway collective agreements in the province. The parties’ relationship is governed by those collective agreements and related Letters of Understanding, which set out processes for resolving wage disputes for certain classifications of employees.

Collective bargaining history and the wage reopener
The most recent Safeway agreements were negotiated over an extended period from March 2017 to March 2020 and proved difficult to conclude. Key complications included Sobeys’ plan to convert about 25% of Sobeys and Safeway stores to its discount FreshCo banner and the onset of the Covid-19 pandemic. These factors created uncertainty about the long-term sustainability of the Safeway brand and the employer’s costs, while the union was seeking to address wage stagnation and compression after Alberta’s minimum wage rose to $15.
In March 2020, mediator Mia Norrie was appointed under Alberta’s Labour Relations Code. She assisted the parties through mediation and bargaining and then issued written recommendations in July 2020. She proposed five-year agreements that used Sobeys’ proposed wage scales to address compression at the lower end but did not grant the additional increases the union wanted for top-rated and over-scale employees. To deal with that unresolved issue, she recommended Letters of Understanding (LOUs) that created a wage reopener for top-rated and over-scale employees in the last two years of the agreements, with binding “final offer selection interest arbitration” if the parties could not agree. The parties accepted the mediator’s recommendations, including the LOUs, and concluded the Safeway agreements in August 2020.

Policy terms and the letters of understanding
The LOUs contained the central “policy” framework for the later dispute. They provided that, for the specified wage reopener, unresolved issues would go to “final offer selection interest arbitration for a binding settlement.” Under this clause, each side would submit a final wage offer and the arbitrator would be required to choose one offer in its entirety rather than crafting a compromise. Another critical clause, paragraph 5 of the LOUs, required the arbitrator to “hear submissions from each of the Parties and then select one of the final offers,” and, in doing so, to “take into consideration the economic and competitive climate of the Employer’s business, and the interests raised in 2020 bargaining.” These factors—economic climate, competitive climate, and 2020 bargaining interests—became the focal points for later legal argument about the scope of the arbitrator’s mandate and the proper approach to comparators.

The wage reopener and the parties’ final offers
In February 2023, the union triggered the wage reopener process under the LOUs for top-rated and over-scale employees. The parties attempted further bargaining but reached an impasse. They agreed to proceed to final offer selection interest arbitration and appointed the same individual who had served as mediator, Mia Norrie, to act as arbitrator.
At the arbitration, Sobeys’ final offer was a 1.5% wage increase effective August 2023 plus a $1,000 lump-sum payment, and a 2% wage increase effective August 2024. The union’s final offer was a 5% wage increase effective August 2023 and a further 5% increase effective August 2024. A two-day hearing took place in July 2025, at which the parties presented evidence and submissions on economic conditions, the competitive grocery market, and the history and context of the 2020 bargaining.

The arbitrator’s final offer selection decision
In November 2025, the arbitrator issued detailed written reasons selecting the union’s final offer. She began by explaining the legal principles governing interest arbitration, particularly the goal of “replicability”—attempting to achieve the result that free collective bargaining would likely have produced—and the central role of comparability. She recognized that, under the LOUs, her mandate was a “final offer selection interest arbitration” focused only on wage changes for top-rated and over-scale employees.
The arbitrator then organized her analysis around the three factors specified in paragraph 5 of the LOUs. On the economic climate, she considered expert evidence about inflation, interest rates, and oil and gas investment, but ultimately found actual wage-settlement data from Alberta’s Bargaining Update more persuasive. That data showed that, in the current environment, private-sector wages were generally increasing as agreements were negotiated.
On the competitive climate of Sobeys’ business, she examined several comparator collective agreements and the employer’s financial evidence. The employer argued that Safeway wages had to stay aligned with its major Alberta competitor, Superstore, and that the LOUs, properly interpreted, effectively tied wage outcomes to Superstore levels to preserve competitiveness. The arbitrator accepted that Superstore was a competitor and a relevant comparator but concluded that wage rates in that agreement were negotiated earlier, in a materially different economic environment, before the sustained inflationary period. She also noted an open question raised by the union about the potential for future arbitration affecting Superstore wages, though she recognized that there was no evidence of an actual wage reopener in Superstore’s contract.
Because she concluded that Superstore and other earlier Alberta grocery settlements reflected a pre-inflation context, she gave them limited weight and broadened her comparator pool. She focused on wage settlements negotiated during the recent high-inflation period, looking at two out-of-province retail grocery agreements—Save-On-Foods in British Columbia and Metro in Ontario—as well as a 2022–2023 Calgary warehouse settlement between the same parties. She found these more recent comparators showed stronger wage increases consistent with the economic conditions, and she regarded the warehouse deal as especially relevant because it involved the same employer and union. Under the “competitive climate” factor she also considered the absence of an “inability to pay” case by the employer: Sobeys did not claim it could not afford the union’s proposal, and it provided only limited financial evidence, while acknowledging that its revenues had benefited from inflation at a time when wages at Safeway had remained relatively stable.
Finally, on the 2020 bargaining interests, the arbitrator found that the employer had successfully obtained “critical changes,” notably around the FreshCo conversion, while the union had not fully achieved its core interest of improving compensation for Safeway employees. She saw the 2020 wage reopener as deliberately designed to revisit compensation for top-rated and over-scale employees once the economic consequences of the pandemic and inflation were clearer. She declined to treat “social justice” arguments about employees’ sacrifices during the pandemic as a proper factor in interest arbitration, holding that such considerations were not permitted drivers of the award.
After weighing all three enumerated factors together, the arbitrator characterized the union’s 5%/5% offer as “aggressive” but not out of line with the Save-On-Foods, Metro, and Calgary warehouse comparators and with broader private-sector patterns. She viewed the employer’s 1.5% increase plus lump sum followed by 2% as significantly inferior to those benchmarks. Concluding that the union’s final offer best replicated what free collective bargaining would likely have produced in the current economic and competitive environment, she selected the union’s offer.

Judicial review before the chambers judge
Sobeys applied for judicial review in the Alberta Court of King’s Bench. The chambers judge accepted that reasonableness was the applicable standard but set aside the arbitrator’s decision as unreasonable and remitted the matter to a different arbitrator for redetermination.
The judge framed the central issue as the proper interpretation and application of the LOUs, especially paragraph 5. He emphasized that where an arbitrator is appointed under an agreement, the terms of that agreement are “most important” and must govern the arbitrator’s jurisdiction. In his view, the arbitrator had allowed general labour-arbitration concepts—replication and the use of comparators—to override the specifically enumerated factors agreed by the parties. While he accepted her analysis of the economic climate and the 2020 bargaining interests as reasonable, he held that her treatment of the “competitive climate” factor was deficient. He concluded that she had effectively given no real weight to Superstore as a key competitor, improperly discounted or ignored local Alberta retail grocery comparators, and was overly focused on more recent out-of-province settlements that did not truly reflect Sobeys’ competitive market.
The chambers judge also expressed concern that the arbitrator seemed to entertain the union’s assertion that the Superstore 2024–2025 wage rates were potentially subject to a wage reopener, when the record before her did not show such a clause. For him, this suggested she had relied on a misunderstanding of the evidence. Overall, he found that by failing to give primacy to the employer’s competitive climate as understood through its Alberta grocery competitors, the arbitrator had strayed from the LOUs’ terms and produced an unreasonable result.

Appeal to the Court of Appeal and standard of review
The union appealed to the Alberta Court of Appeal. The central question became whether the chambers judge had properly applied the reasonableness standard mandated by the Supreme Court of Canada’s Vavilov framework, or whether he had impermissibly reweighed evidence and substituted his own view of the merits. The Court of Appeal confirmed that reasonableness was the correct standard for reviewing the arbitrator’s decision and that on an appeal from a judicial review decision, the appellate court focuses directly on the administrative decision—the arbitrator’s award—rather than deferring to the reviewing judge’s reasoning. The Court underscored that its institutional role under Vavilov is to review, not decide the merits anew, and that issues once labeled “jurisdictional errors” are not a separate category for correctness review.

Interpretation of the LOUs and the arbitrator’s mandate
The Court of Appeal held that the arbitrator’s interpretation of the LOUs, including paragraph 5, was reasonable. It emphasized that interest arbitrators have an “interpretive upper hand” when construing the instruments that define their mandate, similar to administrative tribunals interpreting their home statutes or contracts. The arbitrator expressly recognized that she was conducting a final offer selection interest arbitration and that she had to consider the economic climate, the competitive climate of the employer’s business, and the interests raised in the 2020 bargaining. Her reasons showed that she treated these factors as interconnected and of equal importance, rather than elevating one factor to automatic priority.
The employer’s argument—largely accepted by the chambers judge—was that the reference to “competitive climate” effectively obliged the arbitrator to keep Safeway wage increases aligned with Superstore and perhaps other Alberta grocery competitors, and that any broader use of comparators was “jurisdictionally inappropriate.” The Court of Appeal rejected this narrow reading. It noted that nothing in the LOUs required that competitive climate be given overriding weight or that Superstore wage rates serve as a ceiling. The arbitrator reasonably concluded that the LOUs must be read as a whole and in light of the nature of interest arbitration, which inherently draws on replication principles and comparative wage data. She expressly considered and rejected the employer’s proposed interpretation that would have effectively locked Safeway employees to Superstore wage levels “regardless of the economic circumstances at the time,” a result she found inconsistent with both the economic climate factor and the design of the wage reopener.

Weighing of evidence, comparators, and competitive climate
Turning to the evidence, the Court of Appeal held that the arbitrator’s assessment of comparators and economic data comfortably met the reasonableness threshold. Her reasons explained why pre-inflation Alberta grocery agreements, including Superstore, were of limited assistance in replicating what free bargaining would have produced during a later period marked by sustained inflation and changing interest rates. She did not ignore Superstore, Calgary Co-op, Forest Lawn IGA, or Banff IGA; instead, she acknowledged their relevance but explained why they carried limited weight: for example, the small, stand-alone nature of some stores, and the overall low wage structure at Calgary Co-op.
The arbitrator then justified looking to more contemporaneous settlements, including Save-On-Foods and Metro, and to the Calgary warehouse agreement between the same parties. The Court of Appeal accepted that in the unusual post-pandemic economic environment, it was reasonable to consider a wider range of comparators, including out-of-province settlements, especially where in-province large unionized grocers had not bargained in the same inflationary period. The Court also accepted the arbitrator’s handling of the union’s comment about a “potential” wage reopener at Superstore; she correctly noted that there was no record evidence of such a clause and treated the point only as an open question, not as a factual finding that such a reopener existed.
On the employer’s financial circumstances, the Court of Appeal noted that Sobeys had not advanced an explicit “inability to pay” case and had chosen to provide limited financial detail. In that evidentiary context, it was open to the arbitrator to reason that some decline in Safeway sales and market share could naturally follow from store conversions to FreshCo and that the employer had benefited from revenue increases while wages for the relevant Safeway employees had remained relatively flat. The arbitrator was also entitled to discount speculative arguments about the union’s supposed inability to mount effective job action on a reopener limited to certain employees, especially given the constrained role such assumptions play in a replication analysis.

Outcome and implications
In the end, the Court of Appeal concluded that the chambers judge had overstepped the proper bounds of reasonableness review by effectively reweighing the evidence and substituting his own preferred interpretation of the LOUs and comparator data. Examining the arbitrator’s reasons with “respectful attention,” the Court found them coherent, transparent, and logically connected to the record. The union’s appeal was therefore allowed, the chambers judge’s order was set aside, and the arbitrator’s decision selecting the union’s final wage offer was reinstated. The successful party in the Court of Appeal was United Food and Commercial Workers, Local No. 401. Although the arbitrator’s decision clearly selects the union’s 5%/5% wage proposal for top-rated and over-scale Safeway employees, this appellate judgment does not quantify the total monetary value of the wage increases or any costs award, so the exact dollar amount ordered in favor of the union and affected employees cannot be determined from this decision alone.