I'm with Wizofoz, I have just retired from Line-Flying but I distinctly remember this 'Melbourne thing'. Nobody else, anywhere in the Country seem to want it. Inbound to MEL from SYD it is common to get, "when ready descend to FL250". If you say " Leaving FL...…" old mate will instantly clear you to "continue descent to 9,000ft". If you don't say 'Leaving..blah blah" you will be ignored until on top of 9,000ft. In the end I just placed it into the 'Australian weirdo bin' and remembered to do it their way.
Then there was Darwin! I miss my flying but I don't miss flying in Australia.