The Act is a 2006 Act (which is six years ago), which was only promulgated in 2008 (five years ago), and even if it does lead to a ban on corporal punishment only does so progressively as schools are required to reregister and this condition is imposed as a condition of reregistration.
The graphic itself, is pretty clearly drawn on the information contained in the current edition of The Law Handbook which is, to say the least, rather confused. I don’t think that’s the fault of the author, who is trying to summarise a very complicated situation as simply as possible.
That’s part of the reason why it, itself, contains conflicting statements: