For all operators.
Must hold an ATPL or complete ATPL prior to acting as pilot in command.
Plus hold the minimum experience as required by CAA/CASA.
For NZ it is in Part 121, I would have a guess that Aussie is similar. So therefore the legal minima would be as per Part 121, but getting a command in a large airline usually takes so long that Commands are no where even close to the legal minima.
121.507 Pilot-in-command experience requirements
Each holder of an air operator certificate shall ensure that each person designated as pilot-in-command of an aeroplane has acquired, prior to commencing the training specified in Subpart I or Subpart M for pilot-incommand, at least—
(1) 1500 hours of flight time as a pilot, including—(i) 500 hours in the type of operations to which this Part applies; and
(ii) 100 hours of instrument time at least 50 hours of which is acquired in actual flight; and
(2) 100 hours of night-flight time for operations to be conducted by the person at night.