How does an operator force you to take leave??
I'm not sure of the specifics but if you ask any QF driver who was on the classic or the A330 over the last three or so years they'll tell you!
They were all assigned out standing annual leave (a couple of weeks a roster) and even long service leave when the A330s were gifted across to Jetstar. I won't comment on the issue that Jetstar at the time were desperately short of qualified A330 drivers with their guys flying max hours.
