Originally Posted by captainv

Seat locks are released if a new, higher-paying type shows up. Thus, a 767 FO under seat lock could bid, say, 777 FO, while a 747 FO under seat lock could not. Bidding a different type incurs another 3-year seat lock, but it's waived for an upgrade.

Originally Posted by 744driver

Yes, the company can waive any seat locks, equipments locks, etc at