And of course, there is the issue of flight time limitations that have to be spread about those several companies, which can put quite a burden on the planning department. Within one organization that can be done of course, across several ones grows into a major headache. I believe in Europe easyjet did it in a way, as pilots could, and in the case of the european pilots, still can, fly across all their AOCs, from what i've been told. In the past, Air Berlin had a similar program that allowed pilots to operate on several AOCs at the same time.