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US State·Passed·Effective October 1, 2026

Connecticut AI Responsibility and Transparency Act (SB 5, CART)

Dates and status re-checked against primary sources on October 15, 2026. How we verify

Connecticut SB 5 (Public Act 26-15), signed by Governor Lamont on May 27, 2026, is formally titled An Act Concerning Online Safety and is also called the Connecticut Artificial Intelligence Responsibility and Transparency (CART) Act. It covers employment AI, AI companions, frontier models, and online safety. The first obligations start October 1, 2026, including the statutory framework for automated employment-related decision technology (AEDT), a rule that an employer's use of AEDT is not a defense to a discrimination complaint, and a requirement that WARN notices tell the Connecticut Department of Labor whether the layoffs are related to the employer's use of AI. AI companion rules follow on January 1, 2027. Employee and applicant notice duties and the developer information-sharing duty apply to AEDTs deployed on or after October 1, 2027, with further provisions phasing in through January 2028.

What this means for your team

If you hire or lay off Connecticut employees and use AI tools in those decisions, you cannot use the tool as a defense to a discrimination claim from October 1, 2026, and any written WARN notice must say whether the layoffs are related to your use of AI. Start listing which hiring and workforce tools use AEDT features now, since employee and applicant notices follow in October 2027.

Key requirements

  • From October 1, 2026: employers cannot use an AEDT as a defense to a discrimination claim
  • From October 1, 2026: WARN notices must disclose to the Department of Labor whether layoffs are related to AI or another technological change
  • From January 1, 2027: operators of AI companions need a protocol to detect user expressions clearly indicating a risk of suicide, self-harm or imminent physical violence, and must tell users they are talking to an AI (at least hourly for users under 18)
  • From October 1, 2027: notices to employees and applicants about AEDT use
  • From October 1, 2027: developer information-sharing duty
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