Yes, Capn, you're right about ICAO requirements re the provision of FIS.
However, Airservices/CASA changed the rules on FIS some years ago by moving away from the situation whereby ATC had the responsibility for providing a directed FIS to aircraft in flight to one whereby the pilot was responsible for obtaining inflight FIS updates through the "self-help" Flightwatch system.
Interestingly, this change from ICAO SARPs does not appear in AIP SUP H12/11 as a listed Australian difference from the ICAO standards.