Originally the New Zealand Parliament remained subordinate to the British Parliament, the supreme legislative authority for the entire British Empire—although, in practice, Britain's role was minimal from the 1890s. The New Zealand Parliament received progressively more control over New Zealand affairs through the passage of Imperial (British) laws such as the Colonial Laws Validity Act 1865, constitutional amendments, and an increasingly hands-off approach by the British government. In 1947, the New Zealand Parliament passed the Statute of Westminster Adoption Act, giving that parliament full power over New Zealand law, and the New Zealand Constitution Amendment Act 1947, an Act of the British Parliament, allowed the New Zealand Parliament to regulate its own composition. In 1973 a further amendment, the New Zealand Constitution Amendment Act 1973, expanded the territorial jurisdiction of New Zealand's parliament.