In 1926, the King–Byng Affair resulted in a constitutional crisis which was the impetus for changes in the relationship between the governor general and the prime minister. Although its key aspects were political in nature, its constitutional aspects continue to be debated. One result was the Balfour Declaration issued later that year, whose principles were eventually codified in the Statute of Westminster 1931. It, and the repeal of the Colonial Laws Validity Act 1865, gave the federal parliament the ability to make extraterritorial laws and abolish appeals to the Judicial Committee of the Privy Council. Criminal appeals were abolished in 1933, but civil appeals continued until 1949. The last Privy Council ruling of constitutional significance occurred in 1954, in "Winner v. S.M.T. (Eastern) Limited". After that, the Supreme Court of Canada became the final court of appeal.