I think it actually is what the FAA granted to CO/Air Micro. I understand that the reason an Air Micro pilot cannot fly for Micro one day, CO the next, then back to Micro is contractual not FAR/FAA. Perhaps a CO pilot can correct me. As I understand the MOCT (Multiple Operating Certificate Training) program, you can jump from one certificate to the other at any time. Why is this so difficult to understand? The aircraft are the same, the training programs and manuals are the same....