The US is mandating ADSB 2 by 2020. By then, who knows what version of ADSB they will be up to...
Oz mandated ADSB 260, which is not compatible with ADSB 2. (260B) I dont hear anything about the retrofit mandate for Oz.
Notice that EUR had mandated forward fit to ADSB 2 by 2015
According to the timeline Boeing was to begin shipping new ac with ADSB II beginning of 2015, (as of 2012) but its anyones guess, as the format has not yet settled.
