EU AI Act's content-labelling rules take effect today
From 2 August the AI Act's Article 50 transparency duties bite across the EU: machine-readable marking, chatbot disclosure and deepfake labels.
What became binding
The European Union's AI Act crossed its most consequential milestone for generative-AI products on 2 August 2026, when the transparency obligations in Article 50 became directly applicable across all 27 member states.
Providers of generative systems must now mark their outputs in a machine-readable way so that synthetic images, audio, video and text can be detected downstream. Systems that interact directly with people — chatbots, voice assistants, agent front ends — must make clear that the counterpart is a machine, unless that is obvious from context. On the deployer side, anyone publishing a deepfake must disclose that the material is artificially generated or manipulated, and AI-generated text published on matters of public interest must be labelled where it has not passed human editorial review. Deployers of emotion-recognition and biometric-categorisation systems must inform the people exposed to them.
The rules are not retroactive: content produced before 2 August does not have to be relabelled after the fact.
Enforcement and the missing half
Enforcement falls mainly to national market surveillance authorities rather than the Commission's AI Office, whose remit is limited to systems built on general-purpose models by the same provider, or systems folded into very large online platforms and search engines. Infringements of Article 50 can draw fines of up to €15 million or 3 percent of worldwide annual turnover, whichever is higher.
The date arrives with a large hole in it. Under the Digital Omnibus on AI — provisionally agreed on 6 May 2026 and confirmed by member-state representatives in the Council a week later — obligations for stand-alone high-risk systems listed in Annex III slip to 2 December 2027, and for AI embedded in regulated products under Annex I to 2 August 2028. What was meant to be the AI Act's main compliance wave has become, in practice, a transparency-only wave.
Companies can lean on the Commission's voluntary Code of Practice on Transparency of AI-generated Content, published on 10 June 2026, which the Commission and AI Board have endorsed as an adequate compliance route; the Commission's 31 July update put signatories at roughly 190 organisations.
Why it matters
This is the first time a major jurisdiction has made provenance marking a legal duty for frontier generative models rather than a voluntary pledge. Because watermarking and disclosure are baked into model serving rather than regional UI, the practical effect will be global: EU rules now shape what every user of a large image, video or voice model sees.