"Counsel for USAPA believe that until seniority integration is completed, the determination of single carrier status is premature and will take that position with the NMB."
Well I disagree with that part of the statement. Obviously US Airways was certified single carrier in the merger with AWA and the seniority integration was not complete.
I do think however, if a SLI agreement is reached between the APA and USAPA absent arbitration, it will happen before single carrier status is granted. If the SLI DOES go to arbitration, that adds time and the NMB would probably grant single carrier status, knowing that while not final, the SLI is in arbitration and will be completed... So for the purposes of single carrier, they would consider the SLI done... Just my take on that part...