Headline is kind of misleading. It requires a notice to be shown in a chat or interface that said chatbot is not a real person if it's not obvious that it's an LLM. I originally took the headline to mean that an LLM would have to tell you if it's an LLM or not itself, which is, of course, not really possible to control generally. A nice gesture if it were enforced, but it doesn't go nearly far enough.