That is incorrect, the OS communicates the data to any “app” running on the system that asks for it. The text of the bill (the CA bill specifically is the one I have read) states that any developer of any app must ask for the age bracket from either the OS or the App Store, so the OS will have to have the API open to any “app” running on the device, not just the “app store”. Also, they define “app store” as any website or software that people can download and install software from, which is VERY broad.