Parents will be allowed to opt out of the time limits for their youngsters.

IMO, most parents will in that case. There needs to be more State (or more reasonably, their qualified and trained teachers) oversight if this is to work. Not as in don't let parents opt out at all, but more like "You want your kid to opt out? Great, tell us why and we'll assess the situation and either approve or deny your opt out request." Or, again more reasonably, "You want your kid to opt out? Great, let's arrange a parent teacher meeting and we can all talk about it and everyone, including the child, gets to voice their opinion, and we'll come to a solution we can all accept."

The notion that kids belong to their parents and so that they should have the final say is outdated. Kids belong to themselves first and foremost, so their future must be protected, and secondly to society because that's where they'll live once they grow up. If the parents are dumb at parenting in a way that jepordizes the child's future, then they need to be corrected for the sake of the child. I'm not saying to prevent the parents from raising their kids or to completely overrule the parents or punish them or anything like that, but I'm saying that teachers and other professionals should also weigh in, work with both the parents and child, and reprimand the parents if they're making a really stupid decision. It takes a village.