from a purely layman's point of view we now have a system where pilots have the following:
1. A medical that is valid for day - pvt - VFR operations only,
2. A medical that says valid up to CPL and within Australian Airspace only. So NVFR, CIR, CPL are all good, or
3. A medical that says the holder does not meet certain ICAO requirements.
The more CASA get into this, the bigger mess they make of it.