Ta for the above, guys.
So...one could be forgiven for thinking that some bright spark decided that for the purposes of being seen to be conforming to a generic ICAO concept we have ended up with the 700/1200 AGL business.
Notwithstanding the fact that, as we all know, in the sunburnt land of Oz "Base of CTA = OCTA" thus making the ICAO (US?) model effectively irrelevant here albeit "politically correct"?
Someone please tell me I`m wrong...