[quails8mydog]

Sounds like if the OS doesn't track anything else about the user, then it won't receive any other signals and will just use whatever was typed in at account creation.

If websites accept this as age verification it could provide a very easy way to bypass it.

In fact, looking at it again, point B specifically says if the "developer" has information rather than the "system" has information. So really sounds like if the developer isn't collecting logs that they can access themselves this wouldn't apply to them.