Refusing dangerous work and preventive withdrawal in Quebec

Overview

Québec prevention law gives workers several ways to avoid exposure before an employment injury occurs. The right to refuse addresses a dangerous task through an immediate workplace investigation. Preventive withdrawal for exposure to a contaminant addresses an individual whose health makes continued exposure dangerous. Pregnancy and breastfeeding provisions protect the worker or child through a request for safe reassignment, followed by withdrawal when reassignment cannot occur.

These mechanisms have different conditions, evidence and financial consequences. A physician's recommendation does not convert every absence into preventive withdrawal; an inspector's finding that work is safe does not establish that the worker acted abusively. The analysis must identify the applicable provision, the danger at the relevant time, the required procedure and the remedy sought.

This lesson concerns the Act respecting occupational health and safety, CQLR c S-2.1 (AOHS; LSST in French). Federally regulated employment has a distinct framework, addressed in Federal occupational health and safety. Compensation for an injury already sustained raises the separate questions examined in Qualifying an employment injury.

Learning Objectives

• Distinguish the conditions and procedures governing refusal, contaminant withdrawal and pregnancy or breastfeeding reassignment.
• Apply the medical, workplace and temporal evidence needed to establish danger and assess a proposed reassignment.
• Identify the applicable pay protection, decision, challenge period and reprisal remedy.

Choose the mechanism before assessing the absence

Section 12 permits refusal where a worker has reasonable grounds to believe that performing particular work exposes the worker, or another person, to danger to health, safety or physical or psychological well-being. The worker need not first obtain a certificate or suffer an injury. The right responds to work that must actually be performed, including an impending assignment; a general objection to an occupation is insufficient.

Section 32 instead requires exposure to a contaminant, danger assessed in light of signs of deterioration in the worker's health, and the prescribed medical certification. Sections 40 and 46 require certification of the particular dangers associated with pregnancy or breastfeeding. Their primary legal consequence is a request for reassignment to duties without the identified danger that the person can reasonably perform.

Status must also be assessed under this statute. Section 11 extends sections 32–48 to specified managers, employer representatives and corporate officers excluded from the ordinary worker definition. It does not extend section 12 to them. An independent business operator is not automatically a worker because they purchased personal compensation coverage; specific extensions, such as the separate regime for recognized home childcare providers, require their own analysis. Neither union membership nor permanent employment is a general condition of these protective rights.

Refusing dangerous work

The initial test combines sincere apprehension with an objective justification. Reasonable grounds are evaluated through the circumstances confronting the worker: the task, equipment, training, protective measures, incidents and credible information about the hazard. Fear without a factual basis is insufficient; certainty that an accident will happen is unnecessary. A reasonable mistake remains different from a refusal used as a pretext in a labour dispute.

Danger must have substance. A speculative possibility inherent in ordinary life does not suffice, but section 12 does not require an imminent accident. Exposure capable of causing harm over time may qualify. Psychological danger is expressly covered, although dissatisfaction with supervision does not by itself establish it. Personal vulnerability must be related to the actual task: a medical condition alone is not proof that every assignment is dangerous.

Section 13 creates two exceptions. Refusal is unavailable if stopping the work would put another person's life, health, safety or physical or psychological well-being in immediate peril. It is also unavailable where the conditions are normal for that kind of work. The normal conditions exception does not make established unsafe practices lawful. Examine accepted work methods, applicable standards, equipment, safeguards and the worker's ability to perform the task safely. An emergency occupation is not categorically excluded, and an employer cannot establish normality merely by showing that no accident has yet occurred.

In Proulx et Établissement de détention de Sherbrooke, 2007 QCCLP 274, the assessment of normal conditions considers the work's inherent risks together with the rules of the art, recognized safety measures, operating conditions and the person's health. The practical implication is to describe what is dangerous about this assignment rather than simply label the occupation dangerous.

Follow the workplace investigation

The worker must immediately notify the immediate superior, employer or employer representative. If none is present, reasonable means must be used to notify one without delay. No ritual wording is required, but the communication should identify the task and the reason for refusal.

The employer then calls the health and safety representative to examine the situation and proposed corrections. If that representative is absent or unavailable, section 16 supplies a sequence: an available representative of the worker's certified association, or otherwise another worker designated by the refusing worker. The absence of a formal committee does not extinguish the right.

After this examination, the worker who persists, the participating representative who considers the work dangerous, or the employer who considers it safe may request an inspector's intervention. Under section 19, the inspector decides whether a danger actually justifies refusal, can order resumption, require corrections and prescribe temporary measures. This determination is distinct from whether the initial refusal rested on reasonable grounds. Reasons must be recorded in writing and communicated to the affected participants.

Section 14 generally prevents replacement until a resumption decision becomes enforceable, subject to the statutory exceptions. For example, where the employer and representative agree that there is no justifying danger, or only a reason specific to this worker, section 17 permits another worker to accept after being informed of the refusal and its reasons. That person retains their own rights. Section 26 requires the inspector to attend within six hours when the refusal prevents at least two other workers from working; failure to attend then permits an informed replacement to accept. Six hours is not a general expiry period for every refusal.

The refusing worker is deemed to be at work. The employer may require availability at the workplace and assign other duties the worker can reasonably perform under section 25. Workers prevented from working by someone else's refusal also receive the protections and obligations in section 28. Leaving the premises without considering these rules can create a separate dispute.

Worked example: An unguarded conveyor

Factual Scenario

An employee is instructed to clear a jam while a conveyor remains powered. A protective guard was removed earlier that morning. The supervisor says that experienced workers routinely perform the operation and offers gloves. The employee refuses the clearing task, immediately explains the missing guard, and remains available for packing duties. The employer threatens an unpaid suspension before contacting the representative.

Withdrawal because exposure threatens impaired health

A contaminant under section 1 may be a substance, microorganism, noise, vibration, radiation, heat or another listed agent generated through the sources specified in the definition. The claimant must establish actual occupational exposure, rather than simply the existence of an agent somewhere in the community. Tasks, routes of contact, duration, frequency and protective measures matter.

Section 32 also requires signs of deterioration in health and a danger arising from the exposure in light of that condition. This is a preventive inquiry, not an automatic occupational disease claim. The source materials describe a substantial line of decisions accepting a pre-existing personal condition that makes the worker particularly susceptible, alongside a narrower historical interpretation requiring deterioration caused by the contaminant itself. A worker's medical vulnerability must be demonstrated and connected to the harmful consequences of the particular exposure; a diagnostic label does not answer the whole question.

The restrictive reasoning in the initial Piché decision cannot be treated as an undisturbed precedent. In Piché c. Entreprises Y. Bouchard & Fils inc., 2024 QCCA 1374, the Court of Appeal quashed the decision and returned the case to the tribunal. The tribunal's analysis had confined the definition too narrowly to production by the employer without sufficiently considering the statutory language, context and preventive purpose. The Court did not itself settle every issue concerning microorganisms or signs of deterioration.

The Tribunal's official register records a subsequent decision in the same litigation by a three-member panel on July 30, 2026. The 2024 remand should therefore not be described as still awaiting a decision. TAT register of three-member decisions.

The Court of Appeal's 2024 judgment also establishes an essential temporal distinction. Later expert evidence may explain what was known when withdrawal became necessary. Newly acquired scientific knowledge may justify ending protection prospectively, but cannot simply erase a danger evaluated using the information available during an earlier period. Date the medical opinions and scientific information; do not evaluate a past preventive decision entirely through hindsight.

Obtain certification and seek safe duties

The certificate under section 32 must attest to the relationship between exposure, danger and impaired health. Under current section 33, it can be issued by a physician responsible for occupational health, another physician or a specialized nurse practitioner. An outside physician or nurse practitioner must first consult the occupational health physician or, failing one, the regional public health director or the physician or specialized nurse practitioner designated by that director. This consultation requirement differs from the pregnancy protocol process.

Delivering the certificate to the employer initiates the request for duties without the relevant exposure that the worker can reasonably perform. The worker must remain capable of some suitable work and available for reassignment. An illness preventing all work ordinarily requires a different legal analysis. Procedural defects and delayed consultation have sometimes been regularized in adjudication, but this does not make certification optional or guarantee retroactive indemnities.

Under section 35, if reassignment is not immediately made, the worker can stop working until safe reassignment occurs or their health and working conditions permit the statutory return. The mechanism protects against the identified exposure; it does not confer a choice between suitable work and an indefinite paid absence.

Worked example: Solvent exposure and respiratory impairment

Factual Scenario

A finishing worker with documented respiratory impairment presents a certificate connecting solvent exposure in a spray booth to a significant danger for their health. The employer offers inventory work in an adjacent room. Measurements show that the same vapours enter that room through a shared ventilation system. The worker can perform inventory duties but requests a location outside the exposure area.

Pregnancy and breastfeeding: safe work comes first

Section 40 concerns physical danger to the unborn child or, because of pregnancy, to the worker. Section 46 concerns danger to the breastfed child. Breastfeeding does not automatically create a right to withdrawal because work hours are inconvenient. Nor does a pregnancy certificate automatically establish the different dangers relevant after birth: breastfeeding protection requires the corresponding certificate and assessment.

Evaluate the actual work, including ergonomic, biological, chemical and organizational conditions. A psychological stressor can be relevant if supported evidence connects it to the physical danger covered by section 40. Pregnancy itself is not an employment injury and does not establish incapacity for all work. Conversely, medically established incapacity to perform any work ordinarily falls outside a mechanism designed to obtain safe duties.

Temporary and on-call workers can qualify. In Dionne v. Commission scolaire des Patriotes, 2014 SCC 33, [2014] 1 SCR 765, a pregnant supply teacher accepted offers of work and invoked her certificate. The Supreme Court rejected the proposition that her inability to perform the unsafe task prevented employment contracts from arising. The obstacle was the dangerous workplace, not an unwillingness to work. However, enrolment on a call list alone does not prove that every future day would have been worked.

Apply the current certificate and protocol process

Under section 40.1, the professional providing pregnancy follow-up assesses danger using the protocols developed under section 48.1. If the danger and associated working conditions are not covered, consultation with an occupational health physician or, failing one, the regional public health director or designated person is required before certification. Section 46 adapts this process to postnatal follow-up.

Eligible follow-up professionals include physicians, specialized nurse practitioners and midwives acting within their professional scope; the CNESST specifies the midwife's postnatal follow-up period as up to six weeks after birth. The certificate must address fitness for work and the identified danger. This current process should not be replaced by an older instruction requiring public health consultation in every pregnancy file. CNESST guidance for follow-up professionals.

The certificate delivered to the employer is an implicit request for reassignment. An offer must clearly identify the duties and conditions so that safety and reasonable ability can be assessed. The employer may modify equipment, methods, hours or the workstation, or offer other duties. Appropriate orientation or training may make a position feasible. The worker must cooperate with effective protective measures and remain available for a valid offer.

In Québec (Ville de) c. Ouellet, 2025 QCCA 825, the Court of Appeal requires reasonable steps to explore safe reassignment, with reasons where it cannot be supplied. This is not an unconditional obligation to create a position. It does mean that treating reassignment as an unexplained discretionary favour misses the statutory purpose. The Supreme Court denied leave to appeal on August 6, 2026; that disposition leaves the appellate judgment standing without itself constituting an endorsement of every reason. Supreme Court docket 42006.

Worked example: A certificate and an unclear reassignment

Factual Scenario

A pregnant laboratory employee provides a properly issued certificate identifying exposure to a particular chemical. The employer says she can perform “administrative duties as needed” but does not specify their location or whether she must still enter the laboratory. She remains able to work and asks for a written description. A week later, the employer offers defined records duties in a separate office, with training and no laboratory access requirement.

Pay, benefits and the duration of protection

During an eligible preventive withdrawal, section 36 provides regular wages for the first five working days, including the statutory treatment of attributable tips where applicable. Through sections 42 and 48, this also applies to pregnancy and breastfeeding withdrawal. The following income replacement indemnity follows the compatible rules of the Act respecting industrial accidents and occupational diseases (AIAOD; LATMP), rather than continuing ordinary salary indefinitely.

For pregnancy or breastfeeding withdrawal, the employer pays the indemnity for the following fourteen complete days and obtains reimbursement; subsequent payment is made by the CNESST. The indemnity generally corresponds to 90% of net income retained under the statutory calculation, subject to the applicable earnings rules and ceiling. Five working days plus fourteen calendar days must not be described as a single nineteen-calendar-day waiting period. Atypical hours and multiple jobs require the particular income calculation, not automatic multiplication of benefits.

Reassignment and full withdrawal have distinct consequences. Sections 38 and 39 protect employment benefits and reinstatement in contaminant cases, subject to contributions and the statutory limits. For cessation under section 39, the benefit protection ordinarily lasts one year, with an exception where working conditions fail the regulatory standards for the contaminant. Pregnancy and breastfeeding have their own protections under sections 43 and 48; do not import that one-year restriction indiscriminately.

The 2025 legislation added employer financial assistance for qualifying part-time or lower-paid pregnancy or breastfeeding assignments. Under sections 48.0.1–48.0.2, the employer must pay the full gross salary of the usual position; reimbursement concerns the qualifying difference, capped by the indemnity otherwise payable. The employer applies during reassignment or within one year after it ends. This current statutory mechanism must be considered before relying on older disputes about combining part-time wages and proportional indemnities. CNESST reassignment policy, October 28, 2025.

The reimbursement calculation also limits the usual gross income to the annual maximum insurable earnings; the assignment's hypothetical earnings must be below that maximum. The worker must retain the section 43 employment benefits. Concurrent assignments or withdrawal benefits from another employer engage aggregate limits. Thus, preserving the worker's full usual salary does not guarantee full reimbursement of every dollar by the CNESST. AOHS, sections 48.0.1–48.0.2.

Entitlement remains connected to the danger, employment and availability. Suitable reassignment, disappearance of the danger, inability to perform any work or a genuine interruption of employment can affect payment. An employer cannot lawfully manufacture a termination to defeat protection. The compensation question and the challenge to a retaliatory termination nevertheless require distinct decisions.

Section 42.1 coordinates pregnancy withdrawal with Québec parental insurance. Where the worker is eligible, indemnification stops from the fourth week preceding the week of expected delivery; eligibility is presumed. Weeks run Sunday to Saturday. Identify the Sunday starting the expected-delivery week and count back four Sundays. This is not simply twenty-eight days before the due date. Ineligibility can rebut the presumption; continued withdrawal entitlement still requires the other conditions. A revised due date must ordinarily reach the CNESST from the follow-up professional at least four weeks before the initially expected delivery date.

Challenge the correct decision and protect the right

An administrative review must target the decision actually made. An inspector's refusal decision is immediately enforceable; sections 20 and 191.1–193 provide ten days from notification for review and ten days to contest the review decision before the Administrative Labour Tribunal (TAT). A challenge does not itself suspend the order. A resumption decision remains operative while the relevant circumstances remain unchanged; materially new conditions require analysis rather than mechanical reliance on the earlier finding.

For disputes about reasonable ability to perform a reassignment, section 37 first involves the health and safety committee or, failing one, the representative and employer, with the required medical consultation. In the absence of both committee and representative, the worker addresses the CNESST directly. Its decision is due within twenty days of the request and operates immediately. Sections 37.1–37.3 provide urgent review and tribunal proceedings, each initiated within ten days of notification.

Questions about remuneration or the income replacement indemnity follow the compatible AIAOD route: ordinarily thirty days for administrative review and sixty days to contest the review decision. The sources identify conflicting classifications of certain preventive-withdrawal eligibility decisions. Do not announce one universal period for every decision in the file; determine its legal basis and operative effect, and preserve the shorter potentially applicable period where classification is disputed. A new certificate, review of an assignment and a challenge to the indemnity calculation answer different questions.

A reprisal is independently prohibited. Sections 30 and 31 protect the refusing worker and participating representative. Their abuse exception permits sanctions within ten days of a final decision where abusive exercise is established; losing the danger dispute alone does not establish abuse. Section 227 allows the qualifying worker to choose the collective agreement grievance procedure or a written CNESST complaint within thirty days of the sanction or measure, rather than duplicate these alternative routes.

Through section 228 and AIAOD section 255, proof of protected exercise and a sanction within six months can activate a presumption requiring the employer to demonstrate another just and sufficient cause. Remedies can include reinstatement, cancellation of the sanction and compensation for lost wages and benefits. The protection of a good-faith exercise must not be confused with automatic entitlement to withdrawal payments when eligibility conditions fail. Likewise, section 11's extension of withdrawal rights to certain managers does not automatically confer every worker complaint remedy.

Practice Checklist

• Identify provincial or federal jurisdiction, statutory status and the specific protective mechanism.
• Record the assignment, exposure, danger, affected person and information available at each relevant date.
• For refusal, assess reasonable grounds, both section 13 exceptions, immediate notification and representative participation.
• For preventive withdrawal, verify the certificate, authorized professional, applicable consultation or protocol and delivery to the employer.
• Examine each reassignment's actual tasks, location, safeguards, training and the worker's reasonable ability and availability.
• Separate ordinary wages, indemnities, benefits, employer reimbursement and the dates when each begins or ends.
• Classify every challenged decision, record notification and preserve the applicable review, tribunal or reprisal period.
• State a reasoned result for each issue without assuming that success or failure on one determines the others.