When does the Colorado AI Act take effect?

01 / The answer

The short answer

The current version applies from 1 January 2027. SB 26-189, signed on 14 May 2026, became law on signing but sets 1 January 2027 as the start date for its duties: developer documentation, notice to consumers, a plain-language explanation within 30 days of an adverse decision, and human review on request. The Attorney General must adopt rules on adverse-outcome disclosures by the same date. The Attorney General alone enforces the law and, for actions filed before 2030, must first give 60 days' notice and a chance to cure.

02 / The rule

What Colorado AI Act requires

Colorado's 2024 AI Act, the first comprehensive US state AI statute, was delayed twice and then repealed and reenacted in May 2026 as a narrower notice-and-transparency law for automated decision-making technology (ADMT). The original risk-management programs and annual impact assessments are gone; the new duties apply from 1 January 2027, with Attorney General rules still in draft.

1. 01Developers: give deployers documentation on intended uses, training-data categories, known limitations, and instructions for appropriate use and human review.
2. 02Developers: notify deployers of material updates or modifications to covered ADMT.
3. 03Deployers: give consumers clear, conspicuous notice at the point of interaction with covered ADMT.
4. 04Deployers: within 30 days of an adverse consequential decision, give a plain-language description of the ADMT's role.

03 / Records

Records to keep

1. 01Developer technical documentation package delivered to each deployer
2. 02Point-of-interaction consumer notice text and placement records
3. 03Adverse-decision explanations sent, with dates within 30 days
4. 04Human review and data-correction request logs, kept three years

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