An exemption to the repositioning has been issued by CASA
http://casa.gov.au/rules/miscinst/2008/CASAEX20.pdf
It includes the following instructions;
"...The aircraft may only carry the flight crew essential for its operation.
Each member of the flight crew must:
(a) be a volunteer who has agreed, in writing without prejudice, to participate in the flight: and ..."
Arse covering by CA$A?