That would do it.

At what point should the offence be commited. If a child approaches a teacher and asks for advice on a sexual or moral matter, is it a crime for the teacher not to immediatly pass that information to parents, or can they at least inform the child that any further discussion will be reported back, and do they want to continue?

Since your objection is to the state would staff at private schools be included? Medical staff such as doctors and nurses, the police and social workers are also generally state employees, are any consersations they might have with children also to be relayed to parents?