I am assuming by this thread this relates to Jet* pilots flying QANTAS 's A330's.
I think cross qual may be the least of your reg hurdles.
Looking at the present flying the A330 does for QANTAS it would have to be a min 180 ETOPS this qual is not quickly attained by the crew or maintenence program, unless of coarse jet star are going to use Qantas's checking and training , QANTAS AOC as well as there maintence program .
If not because Jet* have there own AOC they must start from scratch on proving flights and all the other regulator hurdles.
Its not a quick process.
So to any Jet* pilot buying A330 books it may pay to be patient.
cheers