@GiorgioComitini
They clearly say it's the social media companies who are to do the monitoring, you know the ones that already monitor everything kids say on their services so they can offer "depressed teenager" as a target category for advertising.
If someone gets miscategorised they can appeal and prove their age by a variety of methods largely determined by the platforms. Yes, I know! Image Google actually having an appeals process that does something!
@kevinrothrock