Sweet, thanks guys.
Sorry... I'm still confused about one last point. The rule is written ambiguously. Can I fly SYD-PER-DRW-SYD?
In other words, are we allowed one flight between BNE/CNS/SYD/MEL-PER and one flight between MEL/SYD–DRW, or are we only permitted to select one flight from ANY of those routes?