Law360 Canada ( March 3, 2026, 9:36 AM EST) -- Appeal by Purolator Canada Inc. (Purolator) from reviewing judge’s decision that the labour arbitrator’s award was reasonable. The issue on this appeal arose out of a judicial review of a labour arbitration grievance award. The arbitrator found that a COVID-19 mandatory vaccination policy imposed on a unionized workforce by its employer, Purolator, which remained in place between Jan. 1, 2022, and May 1, 2023, was unreasonable as of June 2022 (Award). Purolator’s petition for judicial review was dismissed on the basis that the Award was reasonable in the administrative law sense. The fundamental point raised on this appeal was that the arbitrator was alleged to have applied a “correctness” standard to key aspects of his determinations in upholding the grievances. Purolator contended that by engaging in a determination of the “correct” scientific conclusion, rather than the reasonableness of maintaining the policy, the arbitrator applied the wrong legal test, resulting in an unreasonable decision. For their part, the Teamsters Local Union No. 31 (Union) argued that assessing the reasonableness of a mandatory and unilaterally imposed vaccination policy required that the arbitrator make findings of fact in the balancing of relevant interests. The respondents argued that the arbitrator reached a reasonable conclusion about Purolator’s COVID-19 Safer Workplace Policy, as that term was understood in the administrative law context, and the appeal should have been dismissed....