Don't know, don't care. I am 29 so P Plates don't worry me. I don't plan on drink driving and getting placed back on to them, not to mention that I live in Adelaide and we don't have these sort of rules, yet. Sorry, but I just don't keep up with these sorts of rules in other states as it does not impact me.
I'm sure there will be exemptions for turbo diesels, or the ruling will be based on power-to-weight ratios. Dunno, haven't read up on any of it.