Bramble,
I can help you with enquires regarding the airline " Qantas " but not " QUantas "
There is not an embargo on these flights, however a warning has been issued to all staff travelling this routing that loads are heavy and just because the seating is not filled to capacity does it mean you will be uplifted. There is a huge backlog of freight to carried and this always takes priorty over subload pax.
Hope this helps.
Warm Regards
Cabinboy