It's a somewhat academic difference but ESRB rating age restrictions aren't enforced by law in the US: it's a voluntary system. The movie rating system is the s

It's a somewhat academic difference but ESRB rating age restrictions aren't enforced by law in the US: it's a voluntary system. The movie rating system is the same. On the other hand, both systems owe their existence in part to government saber-rattling that they would impose actual regulation. Some attempts at actual legal enforcement have been struck down over the years.