Code of Practice on Transparency of AI-Generated Content (EU AI Act Art. 50 marking and labelling)

Summary

The code of practice was drawn up by independent experts in a multi-stakeholder process facilitated by the European AI Office. It details measures to help providers and deployers of generative AI systems comply with the legal obligations to mark and label AI-generated content. Adherence is voluntary, but the transparency requirements under Article 50 are legal obligations that apply from Aug 2, 2026. About 190 organisations signed the code.

Who it applies to

Voluntary code for providers and deployers of generative AI systems, supporting compliance with the marking and labelling obligations of Article 50(2),(4) and (5) of the AI Act. Signatories are listed publicly, regardless of their place of establishment or operation.

Key points

• Supports compliance with marking and detection of AI-generated content and labelling of deep fakes and certain AI-generated publications.
• Adherence is voluntary; the Article 50 obligations remain legally binding.
• For signatories, future enforcement will focus on monitoring adherence to the code, offering predictability and legal certainty across the EU.
• Signatories include Aleph Alpha, Anthropic, Black Forest Labs, Cohere, Google, Meta, Microsoft, Mistral, Open AI and Synthesia; the code remains open for signature.

Key dates

Compliance date

Aug 2, 2026