What It Does
Washington HB 1170 mandates that content providers notify users whenever content has been developed or substantially modified by artificial intelligence. The law creates an affirmative disclosure obligation: if AI generated or materially altered the content a user is consuming, the provider must say so. The disclosure requirement applies across content types — text, images, audio, and video. HB 1170 was signed into law with an effective date of February 1, 2027, giving content providers approximately ten months from enactment to build disclosure systems.
Who It Applies To
HB 1170 applies to content providers operating in Washington or serving Washington-based users. “Content provider” covers any entity that publishes, distributes, or makes available content to users, including media companies, marketing agencies, social media platforms, news organizations, and businesses using AI to generate customer-facing content. The law does not specify revenue or employee thresholds, making it broadly applicable. E-commerce sites using AI-generated product descriptions, SaaS companies with AI-drafted help articles, and publishers using AI writing assistants all fall within scope. If you publish AI-generated or AI-modified content accessible to Washington users, you are covered.
Key Provisions
- Mandatory disclosure: Content providers must inform users when content has been developed or substantially modified by AI.
- Broad content scope: The law covers text, images, audio, video, and other media types generated or materially altered by AI systems.
- User notification: Disclosure must be clear and conspicuous — buried fine print is unlikely to satisfy the requirement.
- No de minimis exception for minor edits: The threshold is “developed or modified by AI,” which may capture AI-assisted editing tools depending on interpretation.
- Enforcement framework: The law operates within Washington’s existing consumer protection enforcement structure.
Compliance Checklist
If you publish or distribute content in Washington, before February 1, 2027 you should:
- Audit content workflows to identify where AI tools generate or substantially modify content — including copywriting tools, image generators, and AI-assisted editing.
- Design disclosure mechanisms that are clear and conspicuous: labels, badges, or inline disclosures that users can see without hunting.
- Update content management systems to flag and track AI-generated or AI-modified content throughout the publication pipeline.
- Train editorial and marketing teams on what triggers the disclosure requirement and how to apply it consistently.
How This Compares
Washington HB 1170 joins a growing class of AI content disclosure laws. California AB 2013 requires similar transparency for AI-generated content, and New York S 8828 imposes transparency obligations on frontier AI model developers. HB 1170 is notable for its breadth — it applies to all content types and all providers, rather than targeting specific sectors like elections or advertising. This makes it one of the most broadly applicable AI disclosure laws enacted to date.
Effective Date Countdown
Compliance deadline: February 1, 2027. As of April 2026, content providers have approximately ten months to implement disclosure systems. The law does not include a phase-in or safe harbor period.
Read the Bill
Author: AI Laws by State. This is not legal advice. For compliance questions specific to your operation, consult an attorney licensed in Washington.