Specifically, Article 6(7) of the EU's Digital Markets Act, which forces Apple to give competing companies access to the same hardware and software capabilities it uses itself.
The EU's interpretation means Apple must provide third-party AI assistants with access comparable to Siri's, potentially including the ability to interact with messages, files, purchases and other apps.
Apple proposed a secure intermediary called Trusted System Agent and an 18-month implementation plan. The European Commission rejected those proposals.