As others have pointed out, this is just a foot in the door. There's also a part of the law this article doesn't cover that requires EVERY application to query this information on every launch, regardless of whether or not the application has any age related limitations.
So it looks like the law only requires it on first launch. Which makes sense if the application can only be run from that one account. Apps that can be launched from multiple accounts are not singled out in the law, but the spirt of the law would have you checking what account is launching the app and are they in the correct age range.
That's not a guarantee. It's up to how the courts interpret that and. Given that this law is meant to handle a moving target like age, I fully expect them to interpret it as its disjunctive form.
Far narrower is doing a lot of heavy lifting in your response.
> (c) “Application” means a software application that may be run or directed by a user on a computer, a mobile device, or any other general purpose computing device that can access a covered application store or download an application.
If your device can connect to a covered application store, every application on your computer must follow this.
