I want to know the answer to the following question:
When was the status of Dominions as equal autonomous communities given legal force?
All the background I'm provided with is that "After pressure from Ireland and South Africa, the 1926 Imperial Conference issued the Balfour Declaration, declaring the Dominions to be "autonomous Communities within the British Empire, equal in status, in no way subordinate one to another" within a "British Commonwealth of Nations".". Is that enough to answer the question?
Answer: no