The CASA is still mandating more calls than necessary. I can see what it's trying to do: make sure everyone makes radio calls in a CTAF; but if there is no one in the vicinity, then a call to introduce yourself as operating in the vicinity of an aerodrome (either on the ground or in flight) with intentions and a response by at least one aircraft to indicate known traffic, should be all that is mandated. Further R/T per guidelines should then follow for separation. But if there is no one else in the vicinity, why clog up the airbands with mandated calls?