Looks like it is here to stay, like it or not.
Some of the formal replies can be found following the below link.
http://www.casa.gov.au/newrules/main...mCAO100-66.pdf
Some of the responses to the concerns raised by experienced engineers leaves me with an impression that this has been rail-roaded through. Seems like a massive step backwards for Australian air safety.
Best of luck to all.