Basically if you a 13-17 year CA at PSA you have to apply at mainline or take your current salary for life.

They then make u interview and if you turn the interview down no more raises. If you interview and don't get it they will then tell u why u didn't and then cap your longevity raises.

The jobs are not guaranteed at mainline they only need to hire 25% of their new hires per year from PSA.