The Statute of Westminster Adoption Act 1947 (Public Act no. 38 of 1947) was a constitutional Act of the New Zealand Parliament that formally accepted the full external autonomy offered by the British Parliament. By passing the Act on 25 November 1947, New Zealand adopted the Statute of Westminster 1931, an Act of the British Parliament which granted full sovereign status and Commonwealth membership to the Dominions ratifying the statute. New Zealand was the last Dominion to do so, as the Dominion of Newfoundland voted to become a part of Canada in 1948.