Your sensationalist thread title doesn't fool anybody anymore Mr Smith. The mandatory fitment of ADS-B in 3~4 years for all aircraft operating above FL290 is not going to break the back of any currently viable corporate jet operation in Australia. Of course aircraft with no ADS-B may be sold overseas and any imported would either have to be fitted with ADS-B or provision made for it to be fitted with the equipment, but if that in itself becomes the financial show stopper then I would argue that the operation itself is not viable. As for Qantas and their 767s the fitment of ADS-B would one of only many many maintenance issues facing those aircraft as by 2013 some of them will be 25 years old. You are drawing an idiotically long bow between regulations regarding mandatory equipment and their cost and pilot employment.