For decades, Canadian human resources and health and safety leaders have operated under a foundational tenet of workplace law: having a robust policy binder is not the same as maintaining a safe workplace. Yet, the precise legal threshold separating an unfortunate, unforeseeable accident from a statutory violation under the Occupational Health and Safety Act (OHSA) has often left employers navigating murky legal waters. In a pivotal ruling, the Ontario Superior Court of Justice has delivered critical clarity on what genuinely constitutes statutory due diligence, establishing clear benchmarks for reasonable precautions, dynamic hazard assessments, and active supervisory enforcement.
As detailed in recent legal analysis by employment law firm Hicks Morley, the court’s decision provides employers with essential guideposts for meeting their obligations under section 25(2)(h) of the OHSA—the broad "general duty clause" requiring employers to take every precaution reasonable in the circumstances for the protection of a worker. For HR professionals, people leaders, and joint health and safety committee (JHSC) champions across Ontario and federally regulated sectors, this ruling underscores a pressing reality: passive compliance protocols will no longer shield an organization from substantial regulatory liability.
Deconstructing the Ruling: The Evolution of Due Diligence
Under Canadian occupational health and safety jurisprudence, regulatory offences are strict liability offences. Once the Ministry of Labour, Immigration, Training and Skills Development establishes that a workplace injury occurred or a statutory standard was breached, the evidentiary burden shifts squarely onto the employer. To avoid severe corporate penalties—which can reach into the millions for corporate entities and include personal liability for supervisors—the organization must establish a defence of due diligence on a balance of probabilities.
Historically, employers have mounted due diligence defences on two potential grounds:
- Reasonable Mistake of Fact: The employer honestly and reasonably believed in a mistaken set of facts which, if true, would have made the act or omission innocent.
- All Reasonable Steps Taken: The employer exercised all reasonable care by taking every precaution that a reasonably prudent employer would have taken in the specific circumstances.
The Ontario Superior Court's decision focused intently on the second branch of this test. The court clarified that the standard of "reasonable care" is not one of absolute perfection or impossible prescience. However, it requires a structured, proactive system that anticipates foreseeable risks, adapts to evolving operational realities, and actively ensures that safety measures are followed on the ground.
"Due diligence is not measured by the thickness of an employer’s safety manual, but by the vitality and consistency of its day-to-day operational enforcement."
The Four Pillars of Defensible Workplace Due Diligence
To withstand judicial scrutiny in the wake of this ruling, HR and safety compliance leaders must ensure their safety management systems embody four operational pillars:
1. Dynamic Hazard Identification, Not Static Checklists
A central insight from the court’s analysis is that workplace hazards are rarely static. Relying on an annual or bi-annual generic risk assessment does not satisfy the duty of care when equipment, workflows, environmental conditions, or staffing levels change. Employers must demonstrate that hazard assessments are responsive to practical realities and that frontline workers are empowered and trained to flag new physical or ergonomic risks in real time.
2. Training Verification Over Simple Attendance Records
Too often, organizations conflate training delivery with worker competence. Under the OHSA, demonstrating that an employee signed an attendance sheet or clicked through a digital slide deck during onboarding is insufficient proof that they understood the hazard. Employers must maintain documented verification of practical comprehension, hands-on evaluations, and periodic refresher training—especially for high-risk equipment or hazardous chemical environments.
3. Active Supervisory Oversight and Progressive Enforcement
Perhaps the most vulnerable link in any due diligence defence is supervisory inaction. The court reiterated that employers cannot turn a blind eye to "routine deviations"—instances where workers bypass safety guards, skip lock-out/tag-out procedures, or neglect personal protective equipment (PPE) to increase speed or efficiency. Supervisors must be legally "competent persons" under the OHSA, actively auditing floor practices and consistently executing progressive discipline when safety rules are ignored.
4. Preventive Maintenance and Safeguard Verification
Equipment failure or modified machinery safeguards frequently sit at the heart of catastrophic workplace incidents. The court underscored that employers must show rigorous, auditable maintenance schedules and pre-operational inspection logs. Deferring scheduled servicing or allowing improvised repairs directly undercuts an organization's claim of having taken every reasonable precaution.
Comparative Framework: Paper Compliance vs. Proven Due Diligence
To assist HR and compliance professionals in benchmarking their current workplace safety posture, the table below illustrates the critical distinctions highlighted by recent judicial scrutiny:
| Safety Management Domain | Vulnerable "Paper Compliance" Posture | Defensible "Due Diligence" Standard |
|---|---|---|
| Policy & Procedures | Standardized manuals stored on a shared drive or shelf; rarely reviewed or updated. | Tailored standard operating procedures (SOPs) regularly reviewed by the JHSC and updated when processes change. |
| Employee Training | One-time onboarding training with signature sign-off sheets; no comprehension testing. | Role-specific instruction paired with practical competency assessments, field evaluations, and structured refreshers. |
| Supervisory Role | Supervisors focus purely on production targets; safety breaches are addressed only after an injury occurs. | Supervisors conduct documented daily/weekly safety audits, deliver toolbox talks, and enforce safety rules consistently. |
| Incident & Hazard Reporting | Near-misses go unrecorded; safety logs are reviewed only during formal annual audits. | Psychologically safe near-miss reporting channels; mandatory investigation of root causes and documented preventative adjustments. |
| Contractor & Temporary Staff | Assuming staffing agencies or third-party vendors handle all safety onboarding independently. | Strict pre-qualification audits, site-specific safety orientations, and equal supervisory oversight of all workers on-site. |
Strategic Action Plan for HR and People Leaders
While environmental health and safety (EHS) teams often handle the engineering and mechanical aspects of compliance, human resources sits at the vital intersection of culture, training, competence, and accountability. HR leaders should take immediate steps to solidify their organization’s due diligence framework:
Step 1: Conduct a Comprehensive Supervisory Competency Audit
Under section 25(2)(c) of the OHSA, an employer must appoint a competent person as a supervisor. Review job descriptions and performance evaluations across all operational leaders. Ensure every supervisor has completed mandatory statutory supervisor awareness training and possesses practical knowledge of the actual hazards associated with the work they direct.
Step 2: Bridge the HR-EHS Silo
In many medium-to-large enterprises, HR and Safety operate in functional isolation. Align these functions by integrating safety compliance into performance appraisals, bonus structures, and disciplinary frameworks. A supervisor who routinely hits production targets while tolerating safety non-compliance represents an intolerable legal and human risk.
Step 3: Fortify the Joint Health and Safety Committee (JHSC)
The JHSC is an employer's most powerful internal regulatory body. Ensure committee members receive timely certified training, have dedicated time to conduct thorough monthly workplace inspections, and receive prompt, detailed written responses from management within the statutory 21-day window.
Step 4: Audit Temporary and Staffing Agency Protocols
With contingent labor usage remaining high across manufacturing, logistics, and retail, HR must verify that temporary workers receive identical safety onboarding and personal protective equipment as permanent staff. The courts have repeatedly affirmed that an employer's duty of care extends to all individuals performing work under their direction, regardless of employment contract structure.
The Road Ahead: Building an Unshakeable Safety Culture
The Ontario Superior Court's ruling is a timely reminder that the law judges health and safety systems not by corporate intent, but by execution and oversight. In an era of heightened regulatory enforcement and steep financial and reputational penalties, the margin for complacency has shrunk to zero.
By transforming written health and safety manuals into dynamic, enforced daily practices, HR leaders can safeguard both their organization’s legal standing and—most importantly—the physical well-being of every worker who walks through the door.