A380 crew are made up of the following employees:
Pilots are direct employees of Qantas (QAL)
Cabin Crew are a mix of direct employees of Qantas (QAL) or employees of Qantas Cabin Crew Australia (QCCA) which is owned by Qantas. Think of it as an Auckland base , but just based in Australia. Majority of the cabin crew working on the A380 are QCCA crew.

Currently crew request to go over to work on the A380. QAL crew can go over for two years and then return back to "normal" flying. However since they must go over under QCCA conditions for the two years with the exception of pay, most QAL have decided not to fly on the A380. QCCA crew that go over stay permanently however the company will eventually have all QCCA crew on the A380. Currently they can choose if they want 747 world or A380 world.

The award however for both QAL and QCCA crew allow for 18 hour rostered duties extendable to 20 hours in unplanned situations. Given that the duty time for LAX-MEL is 17h25m it doesn't allow for much of a delay. Pilots have different duty time limitations however with 4 pilots it doesn't become such an issue.