The legal system of New Zealand
English common law received in 1840 and developed by New Zealand courts into a distinct body of law. The defining feature is that there is no single written constitution and no judicial power to invalidate an Act of Parliament: the New Zealand Bill of Rights Act 1990 is an ordinary statute, and section 4 expressly forbids courts from holding any enactment invalid for inconsistency with it. The other defining feature is the Treaty of Waitangi, whose principles are referenced in dozens of statutes and are enforceable in practice through the Waitangi Tribunal and judicial review rather than as directly binding law.
Legal tradition
New Zealand belongs to the common law tradition. English common law received in 1840 and developed by New Zealand courts into a distinct body of law. The defining feature is that there is no single written constitution and no judicial power to invalidate an Act of Parliament: the New Zealand Bill of Rights Act 1990 is an ordinary statute, and section 4 expressly forbids courts from holding any enactment invalid for inconsistency with it. The other defining feature is the Treaty of Waitangi, whose principles are referenced in dozens of statutes and are enforceable in practice through the Waitangi Tribunal and judicial review rather than as directly binding law.
How power is divided
Unitary. Parliament legislates for the whole country and there are no states or provinces. Regional and territorial authorities exist only under the Local Government Act 2002 and exercise delegated statutory powers. Tokelau is a non-self-governing territory, while the Cook Islands and Niue are self-governing in free association with New Zealand and have their own legal systems.
Where law comes from
- Acts of Parliament
- Parliament is sovereign; no court may invalidate a statute.
- Common law and equity
- Received in 1840 and developed by New Zealand courts; English decisions are persuasive only.
- The Treaty of Waitangi
- Not directly enforceable, but its principles are incorporated by many statutes and inform interpretation.
- Tikanga Māori
- Recognised as part of the common law of New Zealand, confirmed by the Supreme Court in Ellis v R (2022).
- Delegated legislation
- Secondary legislation is subject to disallowance by Parliament and to review by the courts.
The legal profession
A fused profession under the Lawyers and Conveyancers Act 2006: a lawyer is admitted as a barrister and solicitor of the High Court, and may then practise as a barrister sole or in a firm. Admission requires an approved law degree, the Professional Legal Studies Course and a certificate of character. The New Zealand Law Society | Te Kāhui Ture o Aotearoa regulates the profession, and King's Counsel are appointed from senior practitioners.
Law by topic in New Zealand
- Immigration & NationalitySix-points Skilled Migrant Category and Accredited Employer Work VisaA points-based Skilled Migrant Category alongside the employer-led Accredited Employer Work Visa. Since 2023 the skilled points system awards points for skill level rather than ranking candidates against each other.
- Property & LandLand Transfer Act 2017 Torrens title with a two-year bright-line testTorrens title under the Land Transfer Act 2017 with electronic conveyancing, restrictions on foreign buyers of residential land, and a bright-line test taxing short-term residential gains.
- Criminal LawUnified national Crimes Act 1961 with statutory offences onlyA unified national criminal law under the Crimes Act 1961, with a single court hierarchy, an early guilty plea and case management regime, and no death penalty.
- Employment & LabourEmployment Relations Act 2000 good faith and the s. 103A testA good-faith framework under the Employment Relations Act 2000. Personal grievances go first to free MBIE mediation, then to the investigative Employment Relations Authority rather than a conventional court.
- Civil ProcedureOne national hierarchy with a $30,000 Disputes TribunalA single national court hierarchy — District Court, High Court, Court of Appeal, Supreme Court — with the Disputes Tribunal handling small claims informally and without lawyers.
- Business & CorporateCompanies Act 1993 with same-day online incorporationOne of the fastest incorporation regimes in the world: a company can be registered online in a day under the Companies Act 1993, with no minimum capital and a single director permitted.
- Tax LawBroad-base low-rate system with 15% GST and no capital gains taxA deliberately broad-base, low-rate system: GST at 15% on almost everything with very few exemptions, no general capital gains tax, no payroll tax and no inheritance tax.
- Constitutional LawUncodified constitution; Bill of Rights Act 1990 s. 4 bars invalidationAn uncodified constitution: no single supreme document, parliamentary sovereignty, and a Bill of Rights that courts cannot use to strike down legislation. The Treaty of Waitangi is a distinct and central constitutional element.
- Family LawEqual sharing under the Property (Relationships) Act 1976No-fault dissolution after two years' separation, and an equal-sharing regime under the Property (Relationships) Act 1976 that applies to de facto partners after three years exactly as it does to spouses.
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