
Unlike many other nations, New Zealand does not have a single constitutional document. Instead, its constitution is uncodified and is made up of various written and unwritten sources, including formal legal documents, court decisions, and practices. While there is no single word count for the New Zealand Constitution, the Constitution Act 1986, which plays a central role, covers the sovereign, the executive, the legislature, the judiciary, and miscellaneous provisions. This act is a key formal statement of New Zealand's constitutional arrangements and system of government.
| Characteristics | Values |
|---|---|
| Nature of the constitution | Uncodified, sometimes referred to as "unwritten" but includes written sources |
| Number of constitutional documents | More than one |
| Constitutional documents | Constitution Act 1986, Imperial Laws Application Act 1988, Electoral Act 1993, Judicature Act 1908, Senior Courts Act 2016, District Court Act 2016, Treaty of Waitangi Act 1975, Ombudsmen Act 1975, Official Information Act 1982, Public Finance Act 1989, New Zealand Bill of Rights Act 1990, Human Rights Act 1993, Magna Carta 1297, The Bill of Rights 1688, Act of Settlement 1701, Royal Marriages Act 1772, Letters Patent Constituting the Office of the Governor-General of New Zealand (1983, amended in 1987 and 2006) |
| Constitutional principles | Democracy, rule of law, parliamentary democracy, individual liberty, equal citizenship |
| Constitutional practices | Conventions |
| Branches of government | Executive (Executive Council), Legislature (House of Representatives and Sovereign in Parliament), Judiciary (Court system) |
| Head of State | King of New Zealand, represented by the Governor-General |
| Role of the monarch | Little direct involvement in day-to-day functions of government, powers delegated to ministers of the Crown or other public bodies |
| Role of the Governor-General | Holds investiture ceremonies for New Zealand Royal Honours, dismisses the prime minister in exceptional cases |
| Electoral system | Mixed-member proportional (MMP) |
| Referendum requirements | Required for changes to the electoral system and term of parliament, Citizens Initiated Referenda Act 1993 allows for non-binding referendums on any issue with a petition signed by 10% of registered electors |
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What You'll Learn
- The New Zealand constitution is an uncodified constitution, with no single constitutional document
- The Constitution Act 1986 is a key statement of New Zealand's system of government
- The constitution is made up of several sources, including legislation, legal documents, and common law
- The role of the monarch and the Governor-General in New Zealand's constitution
- The Treaty of Waitangi as a founding document of the New Zealand constitution

The New Zealand constitution is an uncodified constitution, with no single constitutional document
The New Zealand constitution is an uncodified constitution, sometimes referred to as an "unwritten constitution". However, this does not mean that there is no written aspect to it. Instead, it is an amalgamation of written and unwritten sources, including formal legal documents, court decisions, and established constitutional practices known as conventions.
The Constitution Act 1986 is a key component of New Zealand's constitution, outlining the country's system of government and recognising the King as the Head of State. The Act describes the three branches of government: the Executive, the legislature, and the judiciary. The Executive consists of the Executive Council, while the legislature is made up of the House of Representatives and the Sovereign in Parliament. The judiciary, meanwhile, comprises the court system. Other laws that outline the powers and functions of these branches include the State Sector Act 1988, the Electoral Act 1993, and the Judicature Act 1908, among others.
The constitution also establishes that New Zealand is a constitutional monarchy with a parliamentary system of government and that it is a representative democracy. The monarch, currently King Charles III, is the Head of State, but they take little direct part in the day-to-day functions of the government. Instead, the sovereign's powers are delegated to ministers of the Crown or other public bodies. The King appoints a Governor-General as his representative in New Zealand, who holds the office for a term of five years and has certain "reserve powers", such as the ability to dismiss the prime minister in exceptional cases.
While New Zealand's constitution is spread across various documents and sources, it also reflects the Treaty of Waitangi as a founding document of government. The Treaty of Waitangi may indicate limits on majority decision-making and accords special recognition to Māori rights and interests. The constitution must also be viewed in its international context, as New Zealand's governmental institutions must consider international obligations and standards.
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The Constitution Act 1986 is a key statement of New Zealand's system of government
The Act recognises the King as the Head of State and the Governor-General as his representative. It establishes that New Zealand has a parliamentary system with a House of Representatives, where members are elected for a three-year term. The Act also addresses the election of the Speaker and their role during the dissolution or expiration of Parliament.
The Constitution Act 1986 replaced the New Zealand Constitution Act 1852 and ended the right of the UK Parliament to legislate for New Zealand. This marked a significant step towards New Zealand's constitutional independence, removing residual constitutional links to the United Kingdom. The Act also repealed the Statute of Westminster and the Statute of Westminster Adoption Act 1947, further emphasising New Zealand's autonomous governance.
The Act outlines the three branches of government: the executive, the legislature, and the judiciary. The executive branch, comprising the Executive Council, is emphasised for its parliamentary nature. The legislature consists of the Sovereign and the House of Representatives, with Parliament holding the power to make laws. The judiciary, represented by the court system, ensures the independence of judges in the Supreme Court, Court of Appeal, and High Court.
The Constitution Act 1986 is a pivotal piece of legislation in New Zealand's constitutional framework. It defines the country's system of government, outlining the roles and powers of key institutions while also recognising the influence of the Treaty of Waitangi as a founding document. This Act, alongside other statutes and legal sources, forms the basis of New Zealand's unique constitutional arrangement.
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The constitution is made up of several sources, including legislation, legal documents, and common law
Unlike many other nations, New Zealand does not have a single constitutional document. Instead, it has an uncodified constitution, sometimes referred to as an "unwritten constitution". However, this is a misnomer, as the New Zealand constitution is an amalgamation of written and unwritten sources.
The New Zealand constitution is found in several sources, including legislation, legal documents, common law, and established constitutional practices known as conventions. The Constitution Act 1986 is a key formal statement of New Zealand's system of government, including the executive, legislature, and judiciary. It recognises the King as the Head of State and the Governor-General as his representative. The Act also covers the sovereign, the executive, the legislature, the judiciary, and miscellaneous provisions.
Other laws that outline the powers and functions of the three branches of government include the State Sector Act 1988, the Electoral Act 1993, the Judicature Act 1908, the Senior Courts Act 2016, and the District Court Act 2016. Other important legislation includes the Treaty of Waitangi Act 1975, the Ombudsmen Act 1975, the Official Information Act 1982, the Public Finance Act 1989, the New Zealand Bill of Rights Act 1990, and the Human Rights Act 1993.
Common law plays a significant role in the New Zealand constitution, with English common law underpinning concepts of liberty, security, and dignity. The prerogative powers of the Sovereign, including the power to appoint the Governor-General, are also part of common law. These powers exist independently of statutes and can only be limited or superseded by legislation.
The New Zealand constitution also includes international obligations and standards, with some British laws incorporated into New Zealand law, such as the Magna Carta 1297 and the Bill of Rights 1688. The Treaty of Waitangi, which recognises Māori rights and interests, is also considered a founding document of the government in New Zealand.
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The role of the monarch and the Governor-General in New Zealand's constitution
The New Zealand Constitution Act 1986 establishes that the King is the Head of State of New Zealand and that the Governor-General is his representative. The King appoints the Governor-General, who typically serve a five-year term, on the recommendation of the Prime Minister of New Zealand. The Governor-General's role is largely ceremonial and involves hosting the monarch and foreign dignitaries, representing New Zealand abroad, and performing constitutional functions such as presiding over the Executive Council, appointing ministers and judges, granting royal assent to legislation, and summoning and dissolving parliament. The Governor-General also holds investiture ceremonies for New Zealand Royal Honours on behalf of the King.
The monarch has little direct involvement in the day-to-day functions of the New Zealand government, with most powers delegated to ministers of the Crown or other public bodies. However, the monarch retains certain reserve powers, such as the ability to dismiss the prime minister in exceptional circumstances. The royal prerogative belongs to the Crown, and in exceptional constitutional crisis situations, the monarch or Governor-General may unilaterally use these powers to ensure the government complies with the constitution.
The Governor-General's role has evolved over time, particularly with the adoption of the Statute of Westminster in 1947, which established the Governor-General as the independent, personal representative of the New Zealand monarch. The Governor-General's role is also influenced by the expectations of the time, the individual in office, the wishes of the incumbent government, and their reputation in the wider community.
While the monarch is the Head of State, the Prime Minister of New Zealand is the head of government and has coordinating responsibilities across all areas of governance. The Prime Minister can advise the Governor-General to dissolve Parliament and call an election, as well as appoint, dismiss, or accept the resignation of ministers.
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The Treaty of Waitangi as a founding document of the New Zealand constitution
Unlike many other nations, New Zealand does not have a single constitutional document. Instead, its constitution is uncodified and is found in formal legal documents, court decisions, and practices. The Treaty of Waitangi is a document of central importance to the history of New Zealand, its constitution, and its national mythos.
The Treaty of Waitangi, sometimes referred to as Te Tiriti, is an agreement between representatives of the British Crown and the Māori iwi (tribes) and hapū (sub-tribes). It was first signed on 6 February 1840 by Captain William Hobson as consul for the British Crown and by Māori chiefs from the North Island of New Zealand. The Treaty has three articles. In the English version, Māori cede the sovereignty of New Zealand to Britain, grant the Crown an exclusive right to buy lands they wish to sell, and are guaranteed full rights of ownership of their lands and other possessions. In return, Māori are given the rights and privileges of British subjects. However, the precise nature of the exchange within the Treaty is a matter of debate due to differences in the Māori and English versions of the Treaty. For example, in the Māori version, the word 'sovereignty' was translated as 'kawanatanga' (governance), leading to differing interpretations of the extent of authority being granted to the British.
The Treaty of Waitangi has played a significant role in shaping the treatment of the Māori people by successive New Zealand governments and wider society, especially from the late 20th century onwards. The Treaty's principles have become a common topic in contemporary New Zealand politics, with over thirty-five principal Acts referring to them as of 2021. The Treaty is also recognised as a founding document of the New Zealand government, with the country's constitution increasingly reflecting this view.
The Treaty of Waitangi Act 1975, the New Zealand Bill of Rights Act 1990, and other legislation have further entrenched the Treaty's principles into New Zealand's legal and political systems. The Treaty's quasi-legal status has helped satisfy the demands of biculturalism in contemporary New Zealand society, and it is generally interpreted today as establishing a partnership between equals, despite the Crown's likely different intentions in 1840. The Treaty's recognition of Māori rights and interests, particularly in Article 2, has led to the law according special consideration to these in many cases. Additionally, autonomous Māori institutions sometimes play a role within the wider constitutional and political system.
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Frequently asked questions
The New Zealand Constitution is uncodified and is spread across various sources, including formal legal documents, court decisions, and practices. Therefore, it does not have a fixed word count.
New Zealand's constitution is sometimes referred to as an "unwritten constitution," but this does not mean there is no writing involved. The absence of a single document allows for flexibility and the inclusion of various sources, such as the Constitution Act 1986, statutes, court decisions, and the Treaty of Waitangi.
The Treaty of Waitangi is increasingly recognized as a founding document of the government in New Zealand. It reflects the aspirations of democracy and the rule of law and has been incorporated into New Zealand law through the Imperial Laws Application Act 1988.
The New Zealand Constitution can be amended through legislation passed by a simple majority of Members of Parliament. However, this power is restrained by law, convention, practice, and public acceptance. Certain key elements, such as the electoral system and term of parliament, require a referendum or the agreement of three-quarters of the Members of Parliament.

























