Should probably have said ELT in the topic. Too tired last night, trying to process to much info..
So I tracked down the regulation, and it is indeed the new type (406MHz) beacon that is required in Aus.
http://www.casa.gov.au/wcmswr/_asset...elt_annexa.pdf
Also have no idea how I missed this, but its on CASA's website spelled out clear as day:
Civil Aviation Safety Authority - Emergency Locator Transmitter (ELT) changes