The documentation for isEligibleForAgeFeatures states:
Use this property to determine whether a person using your app is in an applicable region that requires additional age-related obligations for when you distribute apps on the App Store.
But what does "region" mean? Is this going to return true if the user has downloaded the app from the US App Store? Or will it go further and geolocate the user and identify them as being within a particular relevant state within the US?