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Canada · QuebecIn force

Quebec updates Schedule I with staged commencement

Quebec's Decree 280-2024 amended RSST Schedule I and respiratory-protection certification requirements. General provisions began March 14, 2024, while specified substance provisions began March 1, 2026.

Scope to keep in mind

A full numerical comparison and check of later Schedule I amendments remain necessary before operational use.

Legal status
in force
Source check
Sep 17, 2026
Topic
Air-contaminant limits, notations and respiratory protection
Technical review
Jiaxi · 2026-09-23

What changed

Previous requirement

Earlier RSST Schedule I and article 45.1 wording.

New requirement or current position

Revised Schedule I provisions and respiratory-protection certification requirements apply according to the amendment.

Who it affects

  • Quebec workplaces with listed contaminants

Dates and milestones

Commencement and compliance dates can differ. Read the conditions beside each date, including any stay or local adoption requirement.

Announcement or publication
Feb 28, 2024
Recorded effective date
Mar 14, 2024
Mar 14, 2024

General provisions

Fifteenth day after February 28, 2024 Gazette publication, calculated from section 3.

Mar 1, 2026

Specified provisions for asphalt fumes, respirable cadmium, water-soluble inorganic chromium VI, diethylene glycol monobutyl ether and ethyl 2-cyanoacrylate

Express exception in section 3 for specified portions of section 2.

What this could mean for your IH program

Retain each substance's commencement date and notation. The table contains multiple commencement dates.

Confirm applicability with a qualified practitioner before changing your program.

Questions and qualifications

  • A complete substance-by-substance comparison of previous and revised numerical limits is not included.
  • Later Quebec amendments require a consolidated Schedule I check before operational use.

Source evidence

  1. Decret 280-2024: modification du RSST

    Gazette officielle du Quebec · February 28, 2024, pages 1108 to 1115; amendment sections 1 to 3

    Amends respiratory certification and Schedule I; section 3 delays five listed substance provisions to March 1, 2026.

  2. Regulatory changes register

    CNESST · Entry dated 2024-02-28, Annexe I

    CNESST marks the Schedule I amendment in force and links the promulgated regulation.

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