Reference Guide

Provincial vs Federal Confined Space Regulations in Canada: A Complete Guide

How to tell which regulatory framework applies to your workplace, the structural differences between O. Reg. 632/05 and Part XI of COHSR, and what each requires for hazard assessment, oxygen levels, training, and documentation.

Why Jurisdiction Matters

The first question for any employer is which regulations apply to their workplace. Most Canadian workplaces are governed by provincial occupational health and safety legislation. A specific category of workplaces, however, falls under federal jurisdiction and is governed by the Canada Labour Code Part II and its accompanying regulations.

The choice of jurisdiction is not optional. It is determined by the nature of the work and the type of business. Getting the jurisdictional question wrong means building a program against the wrong set of regulations, which can lead to compliance gaps that surface during inspections, audits, or worse, after an incident.

Which Workplaces Are Federally Regulated

Federal jurisdiction applies to specific categories of workplaces and industries:

Federal government departments and agencies, including Crown corporations
Banks and federally regulated financial institutions
Telecommunications, broadcasting, and inter-provincial communications
Air, rail, and marine transportation across provincial or international borders
Inter-provincial road transportation and pipelines
Agriculture and grain handling operations connected to international trade or grain elevators licensed under federal grain regulations
Uranium mining and atomic energy facilities
First Nations governance and on-reserve operations in many cases
Most federally chartered business activities

If your workplace operates entirely within one province and is not in one of these federally regulated categories, you are governed by your provincial regulations.

Ontario Provincial Framework

In Ontario, confined space work is governed by Ontario Regulation 632/05 (Confined Spaces) under the Occupational Health and Safety Act (OHSA). The regulation was consolidated on July 1, 2011 from four previous sector-specific regulations into a single comprehensive framework.

Key requirements under O. Reg. 632/05 include:

A written confined space program for each workplace with confined spaces (Section 5)
Hazard assessment carried out before any worker enters a confined space, recorded in writing, considering hazards from design, construction, location, use, contents, and hazards that may develop during work (Section 6)
A written plan with procedures for controlling identified hazards, developed and implemented by a competent person (Section 7)
Worker and supervisor training (Section 8)
An entry permit system (Section 10)
Atmospheric testing showing oxygen content between 19.5 and 23 per cent by volume, and contaminant levels within applicable limits
Rescue planning, equipment, and procedures
Coordination requirements where multiple employers are involved (Section 4 and the lead employer concept)

Ontario's framework treats all confined spaces under a single set of requirements. There is no separate category for hazardous confined spaces. Every confined space must be assessed and controlled under the full regulatory framework.

Federal Framework

Federally regulated workplaces fall under Part XI of the Canada Occupational Health and Safety Regulations (COHSR), which was amended significantly with changes that came into force on October 1, 2021. The amended Part XI introduced a key distinction not present in Ontario: two categories of confined space.

Under Part XI:

A confined space is a space that is enclosed or partially enclosed, is not designed or intended for continuous human occupancy, and has limited or restricted means of entry, exit, or internal configuration that could complicate emergency response.
A hazardous confined space is a confined space that, when entered, occupied, or exited by persons, presents hazards likely to cause injury, illness, or other adverse health effects because of its design, construction, location, atmosphere, materials or substances in it, work activities, or other physical hazards.

The full regulatory requirements for assessment, qualified persons, written reports, entry procedures, atmospheric testing, rescue, and training apply to hazardous confined spaces. Confined spaces that are not hazardous still require employers to establish safe entry procedures, person-check systems, and emergency response procedures.

Federally regulated employers must also:

Survey the workplace to determine all confined spaces (Section 11.02)
Maintain a record of all confined spaces, kept up to date and readily accessible
Have a qualified person conduct hazard assessments and produce signed and dated reports (Section 11.03)
Establish entry procedures with the dates they were established (Section 11.04)
Provide instruction and training (Section 11.12)
Retain records of training (Section 11.13)
Maintain oxygen levels between 19.5 and 23 per cent by volume in hazardous confined spaces

Federal regulations also include specific provisions for closing off confined spaces, hot work, ventilation equipment, and safety harness and lifeline requirements.

Side-by-Side Comparison

Ontario (Provincial)

Federal

Regulatory Source

Ontario

O. Reg. 632/05 under the Occupational Health and Safety Act

Federal

Part XI of the Canada Occupational Health and Safety Regulations under the Canada Labour Code Part II

Enforcement

Ontario

Ministry of Labour, Immigration, Training and Skills Development (MLITSD)

Federal

Labour Program of Employment and Social Development Canada (ESDC), Federal Department of Labour

Categorization

Ontario

Single category. All confined spaces require full program requirements.

Federal

Two categories. Confined spaces and hazardous confined spaces, with different obligations for each.

Required Oxygen Range

Ontario

19.5 to 23 per cent by volume

Federal

19.5 to 23 per cent by volume

Hazard Assessment Frequency

Ontario

Reviewed as often as necessary to ensure the plan remains adequate (Section 6(9)). No fixed timeline.

Federal

Reviewed when conditions inside the confined space have changed. Industry practice and the National Joint Council directive reference a 3-year review cycle.

Documentation Requirements

Ontario

Written program, written assessment, written plan, written entry permit (the assessment may be incorporated into the entry permit).

Federal

Written list of confined spaces, signed and dated qualified person's report, written entry procedures with dates established.

Key Differentiator

Ontario

Single comprehensive regulation applying uniformly to all confined spaces.

Federal

Two-tier system with stricter requirements for hazardous confined spaces.

Penalties

Ontario

Up to $25,000 or 12 months imprisonment per individual; up to $500,000 per corporation per offence.

Federal

Penalties under the Canada Labour Code Part II, with a separate penalty structure under the Code.

Cross-Jurisdictional Considerations

Some Ontario workplaces are subject to federal jurisdiction even though they operate locally. Common examples include:

Grain elevators licensed under the Canada Grain Act
Federally regulated agricultural processing operations
Banks and credit unions
Inter-provincial transportation hubs
Federal government facilities

For agricultural workplaces specifically, the jurisdictional question matters because the federal Department of Labour has emphasized agricultural confined space safety in recent enforcement priorities. A grain elevator licensed federally must build its confined space program under Part XI, not under O. Reg. 632/05.

Some agricultural operations may have parts of the business under different jurisdictions. A vertically integrated feed and grain operation might have grain handling under federal jurisdiction and on-farm production under provincial jurisdiction. In these cases, both regulatory frameworks apply to the relevant parts of the business.

How CCL Health & Safety Helps

CCL Health & Safety builds confined space programs for workplaces under both jurisdictions. Our specialty is identifying which regulatory framework applies, designing programs that meet the relevant requirements, and producing documentation that holds up to inspection.

We work with industrial workplaces under O. Reg. 632/05 and federally regulated agricultural and industrial workplaces under Part XI. For multi-jurisdiction operations, we build coordinated programs that meet both frameworks where applicable.

For more detail on our confined space program development services, see Confined Space Program Development. To draft a permit aligned to either framework, our Confined Space Entry Permit Generator is a free tool. For practical detail on assessment review timelines under either framework, see how often a confined space assessment needs to be updated under O. Reg. 632/05.

Section-by-Section Reference

For a section-by-section explainer of each framework and the standard that complements both, see:

Ontario Regulation 632/05 Explained: the provincial framework, section by section
Part XI of COHSR Explained: the federal framework with the post-2021 hazardous confined space distinction
CSA Z1006:23 Explained: the National Standard of Canada that complements both regulatory frameworks
OHSA Section 25(2)(h) and Due Diligence Explained: the Ontario general duty clause and the nine measures of due diligence

Frequently asked questions

Does Ontario Regulation 632/05 apply to agricultural workplaces?+

O. Reg. 632/05 applies to most Ontario workplaces under the Occupational Health and Safety Act, with specific exclusions for diving operations and certain emergency work. However, agricultural workplaces that are federally regulated, such as licensed grain elevators or operations connected to inter-provincial trade, fall under Part XI of the Canada Occupational Health and Safety Regulations instead. The jurisdictional question must be answered first before applying the right framework.

What is the difference between a confined space and a hazardous confined space?+

This distinction exists only in federal jurisdiction. Under Part XI of the Canada Occupational Health and Safety Regulations, a confined space is any enclosed or partially enclosed space not designed for continuous occupancy with limited entry or exit. A hazardous confined space is a confined space that presents specific hazards likely to cause injury, illness, or adverse health effects. Hazardous confined spaces require the full regulatory program. Non-hazardous confined spaces require entry procedures and emergency response systems but not the full hazard assessment program. Ontario's O. Reg. 632/05 does not make this distinction. All confined spaces in Ontario require the full program.

How often does a confined space hazard assessment need to be reviewed?+

Under Ontario Regulation 632/05 Section 6(9), the assessment must be reviewed as often as necessary to ensure the relevant plan remains adequate. There is no fixed timeline in the regulation. Industry practice in Ontario typically uses a 3-year review cycle. Under federal Part XI, assessments must be reviewed when conditions in the confined space change, and the National Joint Council directive references a 3-year accuracy review of the qualified person's report.

Who can perform a confined space hazard assessment in Ontario?+

Under O. Reg. 632/05, the assessment must be carried out before any worker enters a confined space, and the written plan must be developed and implemented by a competent person. A competent person is someone who is qualified because of knowledge, training, and experience to perform the work, is familiar with the OHSA and regulations, and has knowledge of any potential hazards. In practice, this often involves a CRSP (Canadian Registered Safety Professional) or equivalent credentialed practitioner.

What happens if I build my program against the wrong regulatory framework?+

Compliance gaps will surface during inspections by the appropriate regulatory body. For Ontario provincial workplaces, this is the Ministry of Labour, Immigration, Training and Skills Development. For federally regulated workplaces, this is the federal Department of Labour. Inspections that find program gaps can lead to compliance orders, fines, or work stoppages. The penalties under each framework are significant, particularly for incidents where program inadequacy is found to have contributed.

Next Steps

Free Path

Try Our Free Tools

CCL provides three free tools for Ontario industrial and agricultural workplaces. Each tool produces a regulator-compliant document or assessment.

Full Engagement

Build a Compliant Program

CCL builds confined space programs for Ontario industrial and agricultural workplaces under both provincial and federal jurisdictional frameworks. Our specialty is producing regulator-defensible documentation and ongoing program management.

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More resources

How Often Does a Confined Space Assessment Need to Be Updated Under O. Reg. 632/05?
Section 6(9) is performance-based, not calendar-based. A breakdown of what it really requires, what triggers a review, where the 3-year industry practice comes from, and the documentation that proves due diligence.
Ontario Regulation 632/05 Explained: A Plain-Language Guide to Ontario's Confined Space Regulation
Section-by-section plain-language guide to Ontario's confined space regulation: scope, definitions, the written program, hazard assessment, the entry permit system, atmospheric testing, rescue, and penalties.
Part XI of COHSR Explained: A Plain-Language Guide to Federal Confined Space Regulations
Plain-language guide to the federal confined space framework: when Part XI applies, the 2021 amendments, the new distinction between confined spaces and hazardous confined spaces, qualified person reports, and entry procedures.
CSA Z1006:23 Explained: A Plain-Language Guide to the Canadian Standard for Confined Space Management
Plain-language guide to Canada's national standard for confined space program management: the Plan-Do-Check-Act framework, what the 14-area scope covers, how it relates to provincial and federal regulations, and what changed in the 2023 edition.
OHSA Section 25(2)(h) Explained: Due Diligence and the General Duty Clause in Ontario
Plain-language guide to Ontario's general duty clause: how Section 25(2)(h) operates, the nine measures of due diligence Ontario courts apply, and how the clause interacts with O. Reg. 632/05 in confined space cases.
CSA Z460:20 Explained: A Plain-Language Guide to the Canadian Standard for Hazardous Energy Control
Plain-language guide to the National Standard of Canada for hazardous energy control: the lockout-first principle, machine-specific energy control procedures, annual audits, training requirements, and what changed in the 2020 edition.
Ontario Regulation 851 LOTO Requirements: A Plain-Language Guide to Lockout/Tagout in Ontario Industrial Workplaces
Section-by-section guide to the LOTO-relevant provisions of Ontario's Industrial Establishments regulation: Section 42 (electrical), Section 75 (motion stopped), Section 76 (locking out), Section 78 (energy release), and Section 119.13 (confined space lockout).

All Resources