So I've found a legal definition of assult on the internet - I admit that I don't know how reliable this website is though.
It doesn't say that children are excluded from this definition. I'm pretty sure that they are legally protected from assult in Australia already. My assumption is that the light smacks that are generally allowed in our society are simply a case of the police not applying this law (maybe because this is considered socially acceptable). Am I wrong in this assumption, is there actually a specific law saying that assult laws don't apply to children?