Dear All,
I agree that the wording of AMC MA707 is not the best and reading it again v your commments made me wonder what the situation is really.
I've just got off the phone to one of my CAA surveyors, who has clarified it for me:
AMC MA707(4) says:
To hold a position with appropriate responsibilities means the airworthiness review staff should have a position in the organisation independent from the airworthiness management process
or with overall authority on the airworthiness management process of complete aircraft.
The bold bit is the key. So far as CAA is concerned, they interpret this as meaning the Airworthiness Review Staff should be EITHER independent OR fully responsible - i.e. no halfway house. I already have one Subpart G approval under my belt done on this basis (CAM is also the only ARS

), with another to follow in Sept, so it seems that is really how things are being seen.
Hope that helps! I love European legislation.