They're not asking for IDs. The user simply has to declare their age. I'm not happy about any of this, but there is no "verification."

It sure sounds like there's no liability if the user lies: "An operating system provider or a covered application store that makes a good faith effort to comply with this title, taking into consideration available technology and any reasonable technical limitations or outages, shall not be liable for an erroneous signal indicating a user's age range..."