Terribly sorry - easy mistake to make!
I'm still not quite getting this - I see the point you are trying to make, but surely same rank, same braid, different organisation solves the problem? Or are we actually kind of saying the same thing? Is it purely down to a bit of paper - the commissioning scroll? What if the VRT transferred to the ATC and simply lost the bit of paper and had ATC instead of VRT?? Same as the ACF (in most cases)?