There is 1 SOC and certificate. Just a training/operating fence since there are different FOM's between the "fenced" 900 and the -200/ATL 900. Last I was told there is a lot of work going on for a common FOM and a streamlining of CFM/POM's to get away from the full initial training footprints. A 96 hour type course would be the next step, followed by a short differences course as an end goal with common books/curriculums. Of course this was the stated plan in July 2010 when all this began, and has caused an expensive train wreck so far.