It is worth pointing out that an RAAus aircraft can be flown into controlled airspaces provided some conditions are met. Amongst these conditions is that the pilot has a CASA part 61 license. From the
Exemption
7.3 A person must not operate a relevant aeroplane in Class A, C or D airspace, or an active restricted area, unless all of the following conditions are complied with:
......................
(d) the aeroplane is flown by the holder of a pilot licence with an aeroplane category rating:
(i) issued under Part 61 of CASR; and
(ii) that allows the holder to fly inside the controlled airspace;
............
Perhaps this is where he has transgressed?..
Edit: Interestingly reading further you only have to have been issued a part 61 license and have done a flight review but there is no requirement to have a valid medical....