# Ontario Employment Standards Act, 2000 - AI disclosure in publicly advertised job postings (Working for Workers Four Act, 2024; O. Reg. 476/24)

- **Jurisdiction:** Canada (CA)
- **Type:** Regulation · **Status:** In force · **Binding:** yes
- **Issued by:** Government of Ontario (Ministry of Labour, Immigration, Training and Skills Development)
- **Proposed:** — · **Adopted:** 21 Mar 2024 · **Effective:** 1 Jan 2026
- **Obligations:** Transparency to users
- **Sectors:** Employment

## Summary
Provincial rule requiring employers with 25 or more employees to state in publicly advertised job postings whether artificial intelligence is used to screen, assess or select applicants. Applies to employers in Ontario.

## Why it matters
Employers and HR-tech vendors recruiting in Ontario must flag AI screening in every public job ad since 1 Jan 2026.

## Source
[Ontario e-Laws (O. Reg. 476/24)](https://www.ontario.ca/laws/regulation/240476) · [secondary](https://www.littler.com/publication-press/publication/ontario-canada-announces-effective-date-and-new-regulations-governing)
Checked against the source on 4 Oct 2026. Provincial (Ontario) measure. 'adopted' is Royal Assent of the Working for Workers Four Act, 2024 (Bill 149, 21 Mar 2024); O. Reg. 476/24 was filed 29 Nov 2024 and the AI-disclosure duty applies from 1 Jan 2026 to employers with 25+ employees. e-Laws requires JavaScript; details confirmed via Littler.

## Cite
Ontario Employment Standards Act, 2000 - AI disclosure in publicly advertised job postings (Working for Workers Four Act, 2024; O. Reg. 476/24). Government of Ontario (Ministry of Labour, Immigration, Training and Skills Development). Status: In force. wheresthe.ai, https://wheresthe.ai/rule/ca-on-esa-ai-job-posting-disclosure-2026/ (verified 4 Oct 2026).

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Canonical page: https://wheresthe.ai/rule/ca-on-esa-ai-job-posting-disclosure-2026/ · Not legal advice.