Reasoning
Multiple US regulatory bodies are actively developing AI governance frameworks with concrete timelines. The FTC has already issued guidance on AI labeling (2023), the SEC is examining AI disclosures, and the White House's Executive Order on AI (October 2023) explicitly mandated agencies to develop AI standards and definitions within 180-270 days. Congress has introduced at least 15 AI-specific bills since 2023, with several (like the Algorithmic Accountability Act) progressing through committees. The EU's AI Act's legal definitions (already enacted) create regulatory pressure for US harmonization. By 2028, at minimum one agency (FTC, SEC, or a specialized body under proposed legislation) is highly likely to establish formal legal definitions of AI-generated content, particularly given the accelerating commercial deployment of generative AI and documented consumer confusion requiring regulatory clarification.Key uncertainty
Whether Congress passes comprehensive AI legislation before agencies act independently—fragmented agency definitions without statutory backing could satisfy the letter of this question but differ substantially from authoritative legal definitions, creating ambiguity about resolution criteria.