I have also read my AIP regarding this extremely important matter.
My copy says:-
ENR 1.1-19, Paragraph 11.1.4
'After any frequency change, pilots must advise the last assigned level and, if not maintaining the assigned level, the level maintaining or last vacated level: eg, "MELBOURNE CENTRE (CALLSIGN) CLEARED FLIGHT LEVEL TWO ONE ZERO, SHALL HAVE BEEN LEAVING HAVING HAS LEFT FLIGHT LEVEL TWO NINER ZERO".'
I also heard some amateur on the radio call "TAXYING". We professionals know to actually call "TAXIING" or "TAXI-ING".
As many posters have already said, good radio calls are the mark of a true professional. Thank god there are no losers posting here.