A certified member believes dangerous circumstances exist. Under the bilateral procedure, what is the first step?
JHSC Part One: Certified members and dangerous circumstances
What dangerous circumstances are, investigating complaints, bilateral and unilateral work stoppages, cancelling a direction and complaints of reckless use.
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- 14 questions
- Topic drill
Study reference: Ontario JHSC Part One sources (Oct 2026), Ch. 7 Certified members and dangerous circumstances — OHSA ss. 44–49; JHSC guide, Certified members
All 14 questions in this test
Every question and its answer choices. The correct answers and explanations appear when you take the test above.
A certified member believes dangerous circumstances exist. Under the bilateral procedure, what is the first step?
- Call the local media and describe the danger in detail
- Order all work in the plant to stop immediately alone
- Wait for the next JHSC meeting to discuss the matter
- Ask a supervisor to investigate in the member's presence
Under the unilateral procedure, what happens after one certified member directs a work stoppage?
- The employer may ignore it until a second certified member agrees
- The employer complies, then investigates with that member present
- The employer must close the whole business for a week
- The member must first get a court order before acting
Is time spent by a certified member on a work stoppage investigation paid?
- Only for managers
- No, never
- Yes, as work time
- Only if upheld
After the employer fixes the hazard, who can cancel a bilateral stop-work direction?
- The employer alone, as soon as it is ready to restart
- The training provider who certified them
- The two certified members jointly, or an inspector
- Any worker who wants to restart the job
An employer believes a certified member stopped work recklessly or in bad faith. What can it do?
- Withhold the member's pay for that month
- File a complaint with the Board within 30 days
- Ask the WSIB to cancel the member's insurance
- Dismiss the member the same day for misconduct
The bilateral procedure will not protect workers from serious risk. Who may apply to the Ontario Labour Relations Board for a declaration?
- A certified member or an inspector
- A neighbour living near the site
- The employer's own insurance company
- Any customer of the business
At which workplace do the certified member work-stoppage sections not apply?
- A small furniture factory
- A police service or fire department
- A large grocery distribution warehouse
- An auto parts plant
A certified member receives a complaint that dangerous circumstances exist. What is the member entitled to do?
- Investigate the complaint
- Fine the employer
- Shut the whole plant for a day
- Dismiss the supervisor
Which three conditions together make a "dangerous circumstance" under the OHSA?
- A contravention, a resulting hazard, and danger from any delay
- A worker complaint, a supervisor's signature, and a written report
- A union grievance, a strike vote, and an inspector's order
- Any accident, any injury, and any property damage that day
The two certified members disagree about whether dangerous circumstances exist. What happens?
- The employer's member wins because management has the final say
- Either may ask an inspector, who gives a written decision
- The matter is dropped and cannot be raised again for a year
- The worker's member wins because worker safety always comes first
The danger continues after the supervisor's investigation. What can the first certified member do next?
- Stop the work alone, without anyone else agreeing to it
- Resign from the committee in protest of the decision
- File a lawsuit against the supervisor personally
- Ask a certified member from the other party to investigate
How must the employer respond to a stop-work direction from certified members?
- Comply immediately, in a way that does not endanger anyone
- Appeal first and keep working until a decision is made
- Ignore it unless an inspector repeats it later
- Comply within 21 days, after sending a written response
When does the unilateral work stoppage procedure apply?
- Whenever a single worker member feels unsafe on the job that day
- Only during the night shift, when managers are absent
- After a Board declaration, or if the employer adopts it in writing
- At every workplace that has more than 50 workers on site
When may two certified members direct the employer to stop work under the bilateral procedure?
- When a worker files any complaint about pay
- When both find that dangerous circumstances exist
- When the employer has missed a JHSC meeting
- When either member thinks the work is unpleasant or dull
Certified members and dangerous circumstances: key rules to remember
Our summary of what the official handbook says on this topic, in our own words. Read it before or after the practice questions above, then check the original chapter. Read the official chapter ↗
dangerous circumstances
- "Dangerous circumstances" means a provision of the Act or regulations is being contravened, the contravention poses a danger or hazard to a worker, and any delay in controlling it may seriously endanger a worker. All three must be present.
- Work-stoppage sections do not apply to police, firefighters and correctional workplaces, or to some health care workplaces if a stoppage would directly endanger another person.
bilateral work stoppage (the normal procedure)
- A certified member who believes dangerous circumstances exist may ask a supervisor to investigate; the supervisor must do so promptly in the certified member's presence.
- If the danger continues after the supervisor's investigation and any remedy, the certified member may ask a second certified member representing the other workplace party to investigate together.
- If both certified members find dangerous circumstances exist, they may direct the employer to stop the work or stop the use of any part of the workplace or any equipment.
- The employer must comply immediately and in a way that does not endanger anyone.
- If the two certified members disagree, either may ask an inspector to investigate; the inspector gives a written decision.
- After fixing the problem, the employer may ask the certified members or an inspector to cancel the direction; the members cancel it jointly, or an inspector may.
unilateral work stoppage
- If the bilateral procedure will not protect workers, a certified member or an inspector may apply to the Ontario Labour Relations Board; the Board may declare the employer subject to the unilateral procedure.
- The unilateral procedure also applies if the employer advises the committee in writing that it adopts it.
- Under it, one certified member who finds dangerous circumstances may direct the employer to stop the work; the employer complies immediately, then investigates in the certified member's presence.
- Disagreements go to an inspector; the member who made the direction or an inspector may cancel it.
OHSA ss. 48–49
- A certified member who receives a complaint that dangerous circumstances exist is entitled to investigate it; the time is paid work time.
- An employer, worker or union may complain to the Board within 30 days if they believe a certified member used, or failed to use, the stop-work power recklessly or in bad faith; the Board may decertify the member.
Program standard 8.1.5 and 8.1.12
- Certified members exercise the right to stop work responsibly; they must know when and how they interact with the ministry.
- The employer must investigate when a certified member reports a dangerous circumstance.
Study the Certified members and dangerous circumstances rules as flashcards →
Other topics
- Certification and the internal responsibility systemHow JHSC certification works (Part One, Part Two, refresher, Chief Prevention Officer), what certified members do, and the internal responsibility system behind Ontario's law.
- The OHSA and how the law worksHow the Occupational Health and Safety Act, regulations, standards and guidelines fit together, key sector regulations, enforcement under Part VIII and penalties.
- Duties of the workplace partiesDuties of employers, supervisors, workers, owners, suppliers and corporate directors, the competent person, and the health and safety policy and program.
- Worker rights: know, participate, refuseThe right to know, the right to participate and the right to refuse unsafe work, the two-stage work refusal process, and protection from reprisals.
- When a JHSC is required and how it runsWhich workplaces need a committee or a representative, membership, co-chairs, meetings, minutes, postings, paid time and worker trades committees.
- JHSC powers and recommendationsWhat the committee may do: identify hazards, obtain information, recommend improvements, the employer's 21-day written response, consensus and co-chair recommendations, and inspector visits.
- Workplace violence and harassmentLegal definitions, policies, programs, risk assessments, the committee's role, reporting incidents, domestic violence and the Human Rights Code.
- Hazard recognition and categoriesHazard, injury and illness, the six hazard categories, the five contributing factors, states of matter, routes of entry and acute versus chronic effects.
- Workplace inspectionsWho inspects, how often, preparing and doing an inspection, reporting hazards to the committee and other ways to find hazards.
- Hazard assessment and exposure limitsMethods for assessing how serious a hazard is, exposure monitoring, the committee's right to be at the start of testing, and TWA, STEL and ceiling limits.
- Hazard control and evaluating controlsControlling hazards at the source, along the path and at the worker, the hierarchy of controls with examples, qualities of good controls and evaluating them.
- Reporting and investigating incidentsNotices of death, critical injury, lost-time injury and occupational illness, the critical injury definition, preserving the scene, and committee investigations.