One curious exception to the foregoing is if an aircrew requests departure from the runway not in use. In such an instance, the Assistant/CDO is either unable or not permitted to issue the clearance and the aircraft has to be transferred to the Tower controller to obtain the clearance. In practice, that would often mean a NELSA 3W from RW32 would become a Pole Hill 2X from RW14. I do not know why the CDO cannot make such a distinction and issue the appropriate clearance. This is the case with all IFR departures. I confess it's not likely to apply to VFR as the aircraft involved generally take the runway in use anyway.
I digress. None of this has anything to do with DOC!