HB 1170 Washington House · 2025-2026 Regular Session

Informing users when content is developed or modified by artificial intelligence.

HB 1170 requires large artificial intelligence providers (with over 1 million monthly users) to disclose when content they generate is AI-made. It mandates two types of disclosures: clear, visible labels ("manifest") and hidden metadata ("latent") identifying the AI system, creator, and timestamp. The bill also requires free, accessible AI detection tools for users to verify content origin, while prohibiting providers from collecting personal data through these tools. Excluded are video games, movies, and streaming content, focusing the rule on generative AI services like text or image tools.
Bill status signed all 5 stages cleared
Introduction
Jan 2026
Committee Review
Mar 2026
House Passage
Mar 2026
Senate Passage
Mar 2026
Signed into Law
Mar 2026
Introduced Jan 12, 2026 Signed Mar 24, 2026
Maddy AI version diff · 4 comparisons

What changed between versions

Engrossed Second Substitute Bill Second Substitute Passed Legislature · 5 edits
MODERATE
The bill was expanded to cover a broader range of AI activities and new government disclosure requirements. It now applies to any AI system with over one million users rather than just massive training operations, adds rules for government agencies interacting with consumers, and moves the effective date to February 1, 2027.
Scope change
The bill's scope expanded from targeting only large-scale AI training providers to including any public AI system with over one million monthly users, and it added a new requirement for government agencies to disclose when they are interacting with consumers via AI.
ELIGIBILITY

The definition of a 'covered provider' was changed from requiring massive computing power and high revenue to simply creating an AI system with over one million monthly users.

REQUIREMENT

A new requirement was added for government agencies to clearly disclose to consumers before or during interaction that they are communicating with an artificial intelligence system.

ENFORCEMENT

The bill now explicitly grants the Attorney General the authority to bring legal actions to enforce the new provisions as unfair or deceptive acts.

TIMELINE

The effective date of the law was moved forward from January 1, 2028, to February 1, 2027.

DEFINITION

New definitions were added for 'generative artificial intelligence' and 'provenance data' to clarify what the law covers.

Floor votes · Senate Mar 4, 2026 · House Feb 13, 2026

How they voted

483
Passed
Total votes 51
Mar 4, 2026
D Democratic31
31 Yea
100% Yea
R Republican20
17 Yea 3 Nay
85% Yea
Vote distribution
All Yea All Nay Mixed No data
Full legislative history

Actions timeline

Total actions
50
Key actions
27
Committee
26
Mar 24, 2026
Signed into law
Governor signed.
executive
Mar 11, 2026
Upper · Passed
President signed.
upper
Mar 11, 2026
Lower · Passed
Speaker signed.
lower
Mar 11, 2026
Lower · Passed
Passed final passage; yeas, 55; nays, 38; absent, 0; excused, 5.
lower
Mar 11, 2026
Lower · Passed
House concurred in Senate amendments.
lower
Mar 4, 2026
Upper · Passed
Committee amendment(s) adopted as amended.
upper
Mar 4, 2026
Senate · Passed
Senate Vote: pass (48-3)
senate
Mar 2, 2026
Upper · Passed
Minority; without recommendation.
upper
Mar 2, 2026
Upper · Passed
WM - Majority; do pass with amendment(s).
upper
Mar 2, 2026
Upper · Passed
Executive action taken in the Senate Committee on Ways & Means at 10:30 AM.
upper
Feb 27, 2026
Upper · Passed
Public hearing in the Senate Committee on Ways & Means at 2:30 PM.
upper
Feb 25, 2026
Committee
Referred to Ways & Means.
upper
Feb 24, 2026
Upper · Passed
Minority; without recommendation.
upper
Feb 24, 2026
Committee
And refer to Ways & Means.
upper
Feb 24, 2026
Upper · Passed
ENET - Majority; do pass with amendment(s).
upper
Feb 24, 2026
Upper · Passed
Executive action taken in the Senate Committee on Environment, Energy & Technology at 1:30 PM.
upper
Feb 20, 2026
Upper · Passed
Public hearing in the Senate Committee on Environment, Energy & Technology at 10:30 AM.
upper
Feb 13, 2026
Lower · Passed
Floor amendment(s) adopted.
lower
Feb 4, 2026
Committee
Referred to Rules 2 Review.
lower
Feb 2, 2026
Lower · Passed
Minority; do not pass.
lower
Feb 2, 2026
Lower · Passed
APP - Majority; do pass 2nd substitute bill proposed by Technology, Economic Development, & Veterans.
lower
Feb 2, 2026
Lower · Passed
Executive action taken in the House Committee on Appropriations at 4:00 PM.
lower
Jan 26, 2026
Lower · Passed
Public hearing in the House Committee on Appropriations at 4:00 PM.
lower
Jan 20, 2026
Committee
Referred to Appropriations.
lower
Jan 16, 2026
Lower · Passed
Minority; do not pass.
lower
Jan 16, 2026
Lower · Passed
Executive action taken in the House Committee on Technology, Economic Development, & Veterans at 10:30 AM.
lower
Jan 14, 2026
Lower · Passed
Public hearing in the House Committee on Technology, Economic Development, & Veterans at 8:00 AM.
lower
Jan 12, 2026
Committee
Referred to Technology, Economic Development, & Veterans.
lower
Jan 12, 2026
Lower · Passed
Rules Committee relieved of further consideration.
lower
Jan 12, 2026
Introduced
By resolution, reintroduced and retained in present status.
lower
Jan 31, 2025
Committee
Referred to Rules 2 Review.
lower
Jan 28, 2025
Lower · Passed
Minority; do not pass.
lower
Jan 28, 2025
Lower · Passed
Executive action taken in the House Committee on Technology, Economic Development, & Veterans at 10:30 AM.
lower
Jan 17, 2025
Lower · Passed
Public hearing in the House Committee on Technology, Economic Development, & Veterans at 10:30 AM.
lower
1 primary · 8 co-sponsors

Sponsors