OK
have done a quick search in the CAR's and looks like there is a loophole.
CAR 233
(h) the latest editions of the aeronautical maps, charts and other aeronautical information and instructions, published in AIP or by a person approved in writing, that are applicable:
Also in the AIP:
AIP ENR 1.10 para 5.1
Pilots are required to carry, and have readily available in the aircraft, the latest editions of the aeronautical maps, charts and other aeronautical information and instructions, published in AIP – or by an organisation approved by CASA – that are applicable to the route to be flown, and any alternative route that may be flown, on that flight.
Are there no commercial versions of the ERSA such as MapTrax for the WAC'S, VTC & VNC data?