I roto i te Whakapuakitanga o Balfour i te Huihuinga Imperial 1926, i whakaae a Peretana me ona mana i "he rite te mana, kaore i te whakawhiwhia ki tetahi ki tetahi i roto i tetahi waahanga o a raatau mahi o roto, o waho ranei, ahakoa i honoa e te pono ki te Karauna, me te hono noa atu hei mema o te British Commonwealth of Nations". I whakaaetia te kupu "Commonwealth" hei whakaahua i te hapori.Ko enei waahanga ki te hononga i whakahaeretia e te Ture o Westminster i te 1931, i pa ki a Canada me te kore e hiahiatia te whakamana, engari ko Ahitereiria, New Zealand, me Newfoundland i whakamanahia te ture kia whai mana. Kaore a Newfoundland i pera, i te 16 o Hui-tanguru 1934, me te whakaaetanga o tana paremata, ka mutu te kawanatanga o Newfoundland ka hoki mai ki te whakahaere mai i Ranana. I uru a Newfoundland ki Canada hei kawanatanga 10 o Ahitereiria i te 1949.
Ko te tau 1949