Context: Currently, (2004), there are principles of canon law common to the churches within the Anglican Communion; their existence can be factually established; each province or church contributes through its own legal system to the principles of canon law common within the Communion; these principles have a strong persuasive authority and are fundamental to the self-understanding of each of the churches of the Communion; these principles have a living force, and contain in themselves the possibility of further development; and the existence of these principles both demonstrates unity and promotes unity within the Anglican Communion. 

Question: As of 2004, what do all Anglican Communion Churches share?
Answer: principles of canon law

Question: What term characterizes the way in which the existence of canon principles can be shown?
Answer: factually

Question: Through what does each member of the Anglican Communion make a contribution to Church law? 
Answer: its own legal system

Question: What kind of force could the canonical principles be said to have within the Communion?
Answer: living

Question: What does having common principles show and support for churches int he Communion?
Answer: unity

Question: As of 2004 what to Anglican Communion churches no longer share?
Answer: Unanswerable

Question: Anglican church law contributes to what for each of its members?
Answer: Unanswerable

Question: What is not fundamental to self understanding of each of the churches of the Communion?
Answer: Unanswerable

Question: What does having individual principle show?
Answer: Unanswerable