Unless something comes out in the SLI or I missed some funky wording, there's nothing in the TA that will force people to only be able to hop certificates once. Kinda hurts management, really. If the CRJ-200 starts taking a hit in the staffing department and there are guys on the Saab or Q that want to bid over there but can't because they jumped to the Mesaba cert in the past, it's less flexibility. One of the key points that management kept harping on was flexibility for them to move things around. There's also a clause in the TA that says they can waive the seat lock provision as necessary. If things get tight on staffing on one airframe while they're overstaffed on another, they'll relax them. Then if no one bids the vacancy, they'll displace. Seems to be their latest MO around here....