XXX you should read the thread that Dick Smith started on ADS-B.
It starts with him complaining that he is currently locked out of airspace above F280 because he is not ADS-B equipped. The trouble is that the technical solution to allow him to be ADS-B equipped does not yet exist because the US based equipment manufacturers (which is basically all of them) are working to a 2020 implementation deadline, not the unique Australian 2014 deadline.
The thread then broadens to examine ADS-B, the cost to aircraft owners of implementation, the fact that Australia is implementing it 3 years + ahead the of the rest of the world and importantly that Australia is the ONLY country in the world to be mandating ADS-B for GA below 10,000 ft
This is another CASA Part 61 type stuff up.