This would have the advantage that as few as 20 or 30 economically and geographically diverse countries could establish a UNPA, and it could expand as more countries ratified the treaty.
其优点是至少20到30个经济及地理条件各异的国家可以建立联合国议会大会，并且会随着更多的国家通过这一条约数量有所增加。