The 1923 and 1926 Imperial Conferences decided that New Zealand should be allowed to negotiate its own political treaties and the first commercial treaty was ratified in 1928 with Japan.
Nas Conferencias Imperiais de 1923 e 1926, outorgóuselle a Nova Zelandia a liberdade para negociar as súas propios tratados internacionais, sendo o primeiro deles con Xapón en 1928.