Wrong....reference Republic Airlines which operated at least 3 separate certificates, Republic, Shuttle America and Chitty Kitty. Republic had 190's on certificate which was not allowed per the DAL CBA. Therefore they didn't fly for DAL, the shuttle cert did with the same pilots same contract just separate certificates.

SkyWest is dissolving the ASQ certificate under the DCI brand strictly to use that cerfticate to fly larger (76+ 86,000+) under the AS brand, mark the tapes.