no upgradeable zeds on any carrier
travel includes spouse, children and parents (but some restrictions)
No seniority. F/O's have pretty much all been given the opportunity to go through the upgrade system (evaluation, sim, line training, final check). Most (all but 2, I think) have been in the first contract, time from joining to completion of upgrade varies from 2.5 years to 5 years. Just luck of the draw. I guess an average would be 4 years.
At present, ALL f/o's are contractors, even the Japanese guys, so there is no difference between local and foreign pilots ( in this respect).
This is all based on the history over the past 11 years. I would expect it to continue like this BUT there are no guarantees. At present we have a capt/f/o ratio of about 2.5:1. They seem happy to be fat with Captains and regularly schedule capts to fly with other captains.
Things are done very differently here, so be prepared to make adjustments and go with the flow, otherwise you won't enjoy the experience.