I find the meaning and knowledge of laws to be inaccessible overall as a 18+ citizen. I'm not American, but who for instance knew that there were "provisions" under the Federal Labor Standards Act?
It makes me angry, but the law here in the US is that "ignorance is not a defense." Oh... you didn't know our several million laws when you broke one? Too bad, they say. Lawyers counter that if the law was simpler, they wouldn't have jobs.
Are you saying that you're holding a 17 year old student in Germany responsible for not understanding US labor laws?