I believe before 18, you need your parents and school principle to sign off. I don't know many kids who didn't work directly out of high school, even with university but in that case, they're just being carried by their parents and will skip directly from "first job" to "their life long career" after graduation.
Not sure this is true... I started working at 15 and put in an application and worked. No parental consent and definitely no school involvement. This would have been in 2005-6...
