Futbaliera, first point, expatriates can not join the CAL's Pilot Union.
Second, they have been fighting to erase the expatriates from CAL since at least 2004.
According to CAL written policy, there is only one seniority list for everyone. Again, according to CAL, there is no difference between UND trainees, Lufthansa trainees, BAE trainees, ROC Air Force or expatriates.
But if you ask me what is my seniority number in CAL...I have to answer that I don't know...
So, you can find guys becoming Captains after 8 years in CAL and other with 10 or more and still in the right seat.
Besides, for been selected to upgrade, you have to pass an advance oral which is very tricky one.