The Statute of Westminster Adoption Act 1947 was a constitutional Act of the New Zealand New Zealand Parliament that formally granted New Zealand full external autonomy. By passing the Act, New Zealand ratified the Statute of Westminster 1931, an Act of the British Parliament, which enabled the Parliaments of the Dominions to leave the British Empire. An aerial view of Parliament of India at New Delhi. ... The Statute of Westminster 1931 was the enactment of the United Kingdom Parliament (December 11, 1931) which established a status of legislative equality between the self-governing dominions of the British Empire and the United Kingdom. ... The Houses of Parliament, seen over Westminster Bridge The Parliament of the United Kingdom of Great Britain and Northern Ireland is the supreme legislative institution in the United Kingdom and British overseas territories (it alone has parliamentary sovereignty). ... The British Empire was the largest empire in history. ...

New Zealand didn't adopt the Statute of Westminster 1931 until 1947 on account of a desire not to foster separatism in the British Empire. However, in the wake of the failure to stem the Japanese advance across the Pacific during WWII, it became increasingly clear to New Zealand that it couldn't rely on the UK for protection, probably resulting in its adoption of the Statute.

The Act was passed on November 25, 1947. November 25 is the 329th (in leap years the 330th) day of the year in the Gregorian calendar. ... 1947 (MCMXLVII) was a common year starting on Wednesday (link will take you to calendar). ...