With the planned expansion you would have thought there would be a future need for DEC but the Sept 11 has dumped a lot of quite experienced ex-Capts in the EK camp and all are expected to achieve commands right on the 3 year limit.
If it got tight then EK will probably use their "accelerated command" rule, but they don't envisage requiring DECs at any stage. So we're told.
Sorry if that's not what you wanted to hear.