Originally Posted by
kiwiandrew
...I know they have an arrangement with NZ for the US-NZ market, but I'm pretty certain that doesn't extend to the US-AU market ?
AUS/NZ - US is a single market in air treaty terms

Hence why QF could fly MEL-AKL-LAX (and still can if it so desired), and NZ could fly SYD-LAX but has chosen not to. Anti-trust allows co-ordination of flight schedules by exchanging data prior to publishing the timetable.