Researching the New Zealand Law

By Julius Hattingh and Mia Petrovic

Julius Hattingh graduated from the University of Auckland, New Zealand, with a BA/LLB (Hons) in 2019. He practiced Intellectual Property and Technology Law at Bell Gully and Hudson Gavin Martin, New Zealand, for four years. Julius completed his LL.M. at Yale Law School in 2025. He is currently a doctoral candidate at Yale Law School, focusing on issues in legal theory and technology.

Mia Petrovic graduated from the University of Auckland, New Zealand, with a BA/LLB in 2019. She clerked at Russell McVeagh before finding her niche in Family Law at Simpson Western, New Zealand, where she practiced from 2019 to 2024. Recently, Mia has worked as an Estates and Family Law Paralegal in Connecticut, U.S. Mia has a particular interest in court administration and improving access to justice for family law and related civil matters.

Published January/February 2026

(Previously updated by Maria Connor in April 2011; by Margaret Greville in November/December 2014; and by Rosa Polaschek in January 2019)

See the Archive Version!

1. The New Zealand Constitution

Like the United Kingdom, New Zealand’s constitution is not formally codified in a single document. Instead, it consists of several written and unwritten sources, including legislation, legal documents, court decisions, and conventions. Together, these sources both reflect and confirm New Zealand’s status as a constitutional monarchy, governed democratically under a parliamentary system. Authoritative information on the New Zealand constitution can be found on the website of the Governor-General, and in particular in the essay ‘On the Constitution of New Zealand: An Introduction to the Foundations of the Current Form of Government’ by the Rt Hon Sir Kenneth Keith (which is also provided as the introduction to the New Zealand Government Cabinet Manual).

Some of the key constitutional sources include:

  • The Constitution Act 1986, a statute that sets out the basic structure, roles, and powers of the executive, legislature, and judiciary, as well as the Governor-General, who represents the King as the Head of State of New Zealand. Other crucial legislation includes the New Zealand Bill of Rights Act 1990 and the Electoral Act 1993.
  • The Treaty of Waitangi, Te Tiriti o Waitangi (the English and Māori language versions of the Treaty of Waitangi were signed in 1840).
  • The royal prerogative, under which the office of the Governor-General is constituted by Letters Patent.
  • Foundational English and United Kingdom statutes, including the Magna Carta 1297.
  • The common law and customary law, which includes tikanga (Māori customary law).

An outline of our current constitutional state of affairs might go something like this:

  • New Zealand is a constitutional monarchy within the “Realm of New Zealand.” The Realm also includes the Cook Islands, Niue, Tokelau, and the Ross Dependency.
  • The Head of State is His Majesty King Charles III in right of New Zealand.
  • The Representative Head of State is the Governor-General (at present, Her Excellency The Rt Hon Dame Cindy Kiro, GNZM, QSO), who is appointed by the King on recommendation of the Prime Minister. The Governor-General formally appoints ministers, summons and dissolves Parliament, and assents to legislation, acting mostly on the advice of ministers.
  • New Zealand follows the Westminster system of parliamentary democracy. Parliament is the supreme legislative body.
  • Parliament is made up of elected Members of Parliament and the Sovereign (represented by the Governor-General).
  • Parliament is elected using the Mixed Member Proportional (MMP) electoral system. The MMP system can produce coalition or minority governments.
  • The Prime Minister (currently the Rt Hon Mr Christopher Luxon) is the head of government and leader of the Executive.
  • The Cabinet, which forms part of the Executive branch and heads various government departments and ministries, is generally formed from senior members of the governing political parties within Parliament.

New Zealand has an independent civil service. It operates as a unitary state, without a federal system. It is a unicameral state, meaning it has a single legislative chamber. It has a House of Representatives in its Parliament and no Upper House.

One consequence of New Zealand’s constitutional setup, particularly the lack of an Upper House and the fact that the Executive is mainly composed of members of the legislature, is that legislation can be enacted very quickly. For example, the Covid-19 Public Health Response Act 2020 was passed under urgency and became law within two days of its introduction. For a relevant and influential analysis of the concentration of political power in New Zealand, refer to the former Prime Minister Sir Geoffrey Palmer’s book Unbridled Power: An Interpretation of New Zealand’s Constitution & Government (OUP, Oxford, 1987). The introduction of the Mixed Member Proportional electoral system in 1996 has arguably moderated some of these concerns by making single-party majorities rare.

A second constitutional-like feature that tends to amplify the speed with which citizens can be made subject to laws is the simplicity with which secondary legislation (also known as delegated legislation) can be brought into force: basically, by signature of a Minister of the Crown.

Note that a few statutory clauses relating to democratic procedure have been entrenched by legislation, meaning that those clauses require either a supermajority of Parliament (75%) or a majority vote at a referendum to amend, as opposed to a bare majority of Parliament. These provisions are listed at section 268 of the Electoral Act 1993.

2. The Treaty of Waitangi / Te Tiriti o Waitangi

One of the foundational documents in New Zealand is the Treaty of Waitangi, te Tiriti o Waitangi. The Treaty, te Tiriti was signed in 1840 between representatives of the British Crown and many Māori chiefs across the country. The Treaty, te Tiriti sets out the relationship between the Crown and Māori. It addresses the authority to govern, the protection of Māori interests, and the rights and privileges of Māori and British subjects.

There are two versions of the Treaty: the English-language version (the Treaty of Waitangi) and the Māori-language version (te Tiriti o Waitangi). The texts differ in important respects, meaning that they cannot always be interpreted compatibly. An overview of the textual differences between the two versions can be found at The Encyclopedia of New Zealand (Te Ara) and the NZ History website, managed by the Ministry for Culture and Heritage.

While the Treaty, te Tiriti is not itself enforceable unless incorporated into statute, it is common for laws to refer to the “principles of the Treaty” and require actions to be undertaken consistently with those principles. The principles have been developed partly in response to the discrepancies between the English and Māori versions of the document. The principles have not been comprehensively defined in one place but have instead been developed by the Waitangi Tribunal (see below), the Courts, and policymakers to reflect the spirit and essence of the Treaty, te Tiriti. Broadly, those principles include the duty to act reasonably and in good faith; the Crown’s active protection of Māori interests; the Crown’s commitment to remedy past grievances; and the Crown’s right to govern. The principles are sometimes understood as: partnership, protection, and participation. A useful introduction can be found at The Encyclopedia of New Zealand (Te Ara). The principles were influentially elaborated by the New Zealand judiciary in New Zealand Māori Council v Attorney-General [1987] 1 NZLR 641 (the Lands case).

The Waitangi Tribunal was established in 1975 as a permanent commission of inquiry to investigate alleged breaches of the Treaty of Waitangi (te Tiriti o Waitangi). The Tribunal’s reports provide historical and legal analysis. They are a valuable source of information about the historical relationship between Māori and the Crown, as well as developing areas of Māori legal jurisprudence. The Waitangi Tribunal’s recommendations are not formally binding, but they carry significant weight in policy and settlement decisions. One example of the Tribunal’s work is the report known as “WAI 262” (the complaint was lodged in 1991, and the final report was delivered in 2011). Among other things, the claim considered Māori rights to mātauranga Māori or Māori knowledge systems, taonga species, indigenous flora and fauna, and cultural and intellectual property. The report discusses potential governance arrangements and the Māori-Crown relationship across different domains of the state.

The Waitangi Tribunal website has more information, including claims and publications.

3. Overview of New Zealand Law

An analysis of the development of the New Zealand legal system, authored by former Prime Minister and legal reformer Sir Geoffrey Palmer, is available at the online encyclopedia of New Zealand, Te Ara.

New Zealand law comprises legislation (primary and secondary), common law, and customary law. Since Parliament is the supreme law-making body, statute is superior to other forms of law. Statutes are supplemented by common law (law developed by judges) and, where appropriate, customary law (which includes tikanga Māori –see below).

Since the signing of the Treaty, te Tiriti, much of New Zealand law has been based on English law. New Zealand common law and statute reflect this heritage, although both now bear a distinctively New Zealand flavour. This is partly a result of the development of the common law, in which each new case draws on legal principles established as precedents in earlier cases. Over time, applying old law to new facts has led to a shift away from some British legal doctrines. Similarly, while some English statutes remain applicable in New Zealand (such as the Magna Carta; see the Imperial Laws Application Act 1988), they have been progressively replaced by New Zealand legislation.

New Zealand law also includes Māori customary law, tikanga. Tikanga consists of the customary legal practices and framework of Māori. Today, tikanga is increasingly recognised–for example, by the majority of the Supreme Court in Ellis v R and by the Law Commission–as the first law of New Zealand and as a part of the common law. At the same time, it is recognised as having a distinct source, method, and authority from ordinary New Zealand common law. Helpful explanations of tikanga and its principles can be found here:

Where Parliament has comprehensively legislated in an area–for example, in criminal law–this will usually supersede or preclude reliance on common law or customary law. However, those non-legislative sources can still play a role in interpreting and applying those statutes. For example, the Crimes Act 1961 precludes judges from creating a “new” crime, but the interpretation of the criminal code will often draw on common law.

New Zealand is a party to many multilateral and bilateral international agreements and treaties (see New Zealand Treaties Online for more information). Although these agreements are not directly enforceable in law unless enacted into statute, they are considered by the courts when interpreting statutes or developing the common law. There is a presumption that Parliament intended to legislate consistently with New Zealand’s obligations in international law.

Further details on the early development of New Zealand’s legal system may be found in the 1966 edition of the Encyclopedia of New Zealand. See also, J Ruru, P Scott, and D Webb, The Aotearoa New Zealand Legal System: Structures and Processes (7th ed., LexisNexis, Wellington, 2022); and P Joseph, Joseph on Constitutional and Administrative Law (5th ed., Thomson Reuters, Wellington, 2021).

4. Parliament and Legislation

4.1. Parliament

The Parliamentary website is an invaluable source of information on everything to do with the New Zealand Parliament and how it works, as well as a vital free resource for anyone seeking copies of Bills, Order Papers, Supplementary Order papers, Parliamentary Debates, Select Committee Debates and Reports, Journals of the House, Standing Orders, and Speakers’ Rulings, amongst other things.

Some of the following links are particularly helpful:

  • How Parliament Works: an overview of the Parliamentary system.
  • Parliamentary Practice in New Zealand: a comprehensive guide to the rules, practices and procedures of Parliament.
  • Standing Orders, Speakers’ Rulings, and Sessional Rulings: these are all the rules and orders that govern Parliamentary behaviour. Although not a statute, they are constitutionally important in shaping how Parliament operates and deliberates.
  • Bills: this is a record of all proposed Bills presented to the Parliament since 2002, together with their movement through the House, and if passed into law, their titles upon enactment. For modern Bills (since 2008), the Bill page will contain a copy of links to all relevant public submissions, Select Committee processes, and Parliamentary speeches, and any other information about the Bill.
  • Select Committees: these are a central part of the New Zealand constitutional system. They vet Bills, consider public submissions, and make amendments to Bills before the House votes on a final version of proposed legislation. They can be influential in developing Bills and slowing down the legislation process to allow public input. In certain circumstances, the majority of the House can always call for urgency in the debates and bypass the Select Committee stage altogether. The use of such a procedure is often criticised. It is also possible to view public submissions to the Select Committees. These often present useful insights into just how the public actually views the proposal in question.
  • Parliamentary Debates (or “Hansard”) provides a record of speeches and debates in the House. The main interface includes a searchable database for debates from 2002 onwards. Researchers may also find here historic debates.
  • The Journals of the House: these are the authoritative record of the House of Representatives.

4.2. Legislation

Legislation is the primary source of New Zealand law. The Parliamentary Counsel Office maintains the official New Zealand Legislation website. This site provides free access to all current Acts and a growing range of secondary legislation. It also includes links to historical legislation and other resources. Paper copies of legislation can also be purchased from Parliament or select bookshops; however, most legal research now relies on digital access.

Another useful source is NZLII, the New Zealand Legal Information Institute platform. The service provides PDF copies of almost all historic legislation in New Zealand, as well as several other useful sources, including:

  • Repealed Acts: a chronological collection of repealed Acts arranged in order of their original enactment.
  • New Zealand Historical Acts –1980 Consolidation: The Consolidated Statutes Enactment Act 1908 was passed to re-enact the consolidated remnants of all previous NZ legislation still in force. This is useful for reviewing legislative histories of many of our most fundamental enactments.

Both LexisNexis New Zealand and Westlaw New Zealand also maintain their own statute databases, which serve as the backbone for all their respective interconnected online legal materials. CCH iKnowConnect (part of Wolters Kluwer New Zealand) maintains selected groups of statutes to support the various online subject collections it publishes (e.g., tax, employment, company law), but not a complete set.

Although these three online compilations of New Zealand legislation are not official, they are meticulously maintained, often have associated commentary, and are widely used in practice.

4.3. Secondary Legislation

Parliament can delegate law-making powers to various entities, including the executive (see below). Such delegation is typically in technical areas or areas subject to significant change, in which it would not be practical for Parliament to constantly re-legislate. However, the areas of law covered by such delegated legislation can be significant. New Zealand’s specific immigration rules, for example, are set by the executive. Such legal instruments can be referred to as “delegated legislation,” “subordinate legislation,” “disallowable instruments,” or “regulations.”

Executive legislation must be within the power delegated by Parliament and can be reviewed by the courts. They are also subject to scrutiny by Parliament in some circumstances, notably through the possibility of a complaint to the Regulations Review Committee.

A more detailed description of the Regulations Review Committee can be found on the Te Herenga Waka – Victoria University of Wellington’s website. Also see: R Carter, J McHerron and R Malone, Subordinate Legislation in New Zealand (LexisNexis, 2013), and P Joseph, Joseph on Constitutional and Administrative Law (5th ed, Thomas Reuters New Zealand Ltd, 2021).

There is currently no single place where all secondary legislation is available. Parliament passed the Secondary Legislation Act 2021 to address the lack of standardisation of secondary legislation and improve accessibility and transparency. The Parliamentary Counsel Office is consolidating existing secondary legislation on the official PCO website, and many instruments can already be accessed there.

5. Executive Branch of Government and Delegated Powers

The Executive branch of New Zealand’s government (or, ‘the Government’) is responsible for administering, implementing, and executing the law, as well as developing policy. A general summary of New Zealand’s public sector and Executive can be found here for reference.

The following is an overview of the main roles and institutions comprising the Executive:

  • Prime Minister: head of the Executive branch of government. The Prime Minister chairs Cabinet, determines ministerial portfolios and allocations (formally these appointments are made by the Governor-General on the Prime Minister’s advice) and serves as New Zealand’s spokesperson both domestically and internationally. The Prime Minister is also responsible for the Department of the Prime Minister and Cabinet (a public-service body).
  • Ministers of the Crown: members of Parliament who head up a “portfolio” (i.e., Health, Education, Foreign Affairs). They are responsible for formulating and implementing policies within their portfolio. They also oversee agencies within their portfolio. The current Ministers can be found at the Beehive website.
  • Cabinet: the central political decision-making body of government, made up of senior Ministers of the Crown. Cabinet exists solely by convention (not by statute). Cabinet decisions collectively bind ministers.
  • Executive Council: made up of all the Crown Ministers, presided over by the Governor-General. The primary function of the Council is to advise the Governor-General to make Orders in Council (i.e., regulations or appointments) and to carry out formal acts of government. Besides legislation of Parliament, Orders in Council are the main way to put government decisions into force. More information can be found at the Governor-General’s website.
  • Government departments and related agencies: the core administrative arms of the Executive, including the Ministry of Health, the Ministry of Education, and the Ministry of Foreign Affairs. They administer statutory schemes, implement regulations, develop policy, and advise ministers. Parliament typically delegates its powers through legislation.

In addition to the core government departments, there are several kinds of organisations that serve or are under the control of the Executive and form part of the ‘public sector’. They include:

  • The Reserve Bank of New Zealand.
  • Crown Entities are entities of the state that have specific functions and operate at arm’s length from the ministries (for example, the New Zealand Transport Agency Waka Kotahi). Crown Entities are governed by the Crown Entities Act 2004.
  • State-Owned Enterprises (SOEs) are companies owned by the government that run as commercial businesses. They were established under the State-Owned Enterprises Act 1986. KiwiRail and Transpower are examples of SOEs in New Zealand.

A list of central government organisations can be found at the Public Service Commission’s website. Additionally, a comprehensive list of all government agencies, departments, and other entities can be found in the New Zealand Government A-Z. Official government websites can be identified by the suffix “.govt.nz”, and often provide comprehensive background information on Ministries and Departments.

Although New Zealand is a unitary system, there are local government bodies that have limited authority to regulate their area. For more information, see the Local Government Commission website.

6. The Courts

6.1. Courts

The New Zealand judiciary operates in a hierarchical system headed by the Supreme Court, followed by the Court of Appeal, the High Court, and the District Court successively. The decisions of each Court set a binding precedent for lower Courts, but do not bind the Court itself; for example, a decision of the High Court binds a District Court but does not bind a future High Court (though it would be considered persuasive authority). This structure is governed by the Senior Courts Act 2016 and the District Court Act 2016. A useful diagram of this structure is set out on the Courts of New Zealand website.

The High Court, Court of Appeal, and Supreme Court are referred to as the Senior Courts. While the Senior Courts control their own procedure, they also operate within the limits set out in the Senior Courts Act 2016. Each court has its own procedural rules: the High Court Rules 2016, the Court of Appeal (Civil) Rules 2005, and the Supreme Court Rules 2004 (all available on the New Zealand legislation website).

There are additional, domain-specific courts that sit within or alongside those referred to above. The District Court of New Zealand encompasses the Youth, Family, Criminal, and Civil Courts. There are several specialist adjudicative bodies, including the Environment Court, Employment Court, and Māori Land Court. The Environment Court sits at the District Court level (decisions are appealed to the High Court), and the Employment Court is at the High Court level (decisions are appealed directly to the Court of Appeal). There are also special jurisdiction bodies such as the Court Martial and the Coroners Court. In the instance of the Māori Land Court and Court Martial, these bodies have their own appeal courts, which then appeal to the Court of Appeal.

As well as following the decisions of superior courts, New Zealand courts may also consider superior court decisions from foreign common law jurisdictions, particularly the United Kingdom, Australia, and Canada, as persuasive authority (not binding precedent).

The New Zealand Courts website is very user-friendly. Information and judgments are delivered promptly, and the Courts have an X account which announces new decisions of public interest and Court sitting calendars.

6.2. Tribunals

The term “tribunal” is a “catch-all” expression that includes a variety of decision-making bodies with different specialist functions. Each operates under its own particular structure, typically created by individual statutes. While some have statutory rights of appeal to the District Court and higher, they may also be subject to judicial review (see below at 6.5). Note that while the Waitangi Tribunal is listed among and accessed from the Tribunals page on the Ministry of Justice website, it has its own administration and comprehensive website.

Many of the authorities provide access to their decisions. However, not all offer complete and comprehensive access. In most cases, this is because material is considered sensitive for commercial or personal reasons, or because of the large numbers involved.

If the Ministry websites do not provide access to decisions, they may be accessible via the New Zealand Legal Information Institute (NZLII).

6.3. Accessing New Zealand Case Law

Three sources of free online New Zealand judicial decisions are:

The Courts of New Zealand website provides access to all current Supreme Court decisions, and Court of Appeal and High Court decisions deemed to be of particular public interest. It includes press releases, judicial speeches, and other information about current hearings, including transcripts of trials in Supreme Court actions. It also maintains a set of resources for finding New Zealand case law.

Judicial Decisions Online, run by the Ministry of Justice, provides a more comprehensive database of modern decisions, including all Supreme Court decisions, Court of Appeal decisions from 2003 onwards, and High Court decisions from 2005 onwards. It provides some access to lower court decisions, including Employment Court decisions from 2025.

NZLII provides a more extensive collection of modern and historic New Zealand case law, including from Senior Courts and specialist courts and tribunals.

In addition to the above:

  • The New Zealand Council of Law Reporting website contains resources relating to the New Zealand judiciary, including access to a variety of useful historic and current case law information.
  • The District Court’s website contains significant decisions from the District Court and its divisions in the Youth and Family Court.
  • The New Zealand Law Society maintains a database of links to sources where you can find decisions by and information about other courts, tribunals, and authorities, including the Employment Court, Environment Court, and Disputes Tribunal.

Finally, note that some historical cases have not been digitized and will not be available in any of the databases listed above. Archives New Zealand holds physical records of historic cases and related materials. University libraries also maintain physical collections of unreported judgements. Further, some early New Zealand decisions have been digitized through the ‘Lost Cases Project’, run by the law school at Te Herenga Waka-Victoria University of Wellington. These cases may be found at Victoria University of Wellington’s website.

6.4. Subscription Access to New Zealand Case Law and Reports

The primary subscription-only legal databases in New Zealand are Westlaw New Zealand (from Thomson Reuters New Zealand), LinxPlus (from LexisNexis together with the New Zealand Law Society) and Lexis+ NZ (from LexisNexis). CCH iKnowConnect (from Wolters Kluwer, including CCH New Zealand) services more specialized subject areas. Together, these services provide the most comprehensive coverage of both reported and unreported case law and secondary commentary. They include access to Senior Court decisions, specialist reports, and case citators and summary services. Recently, vLex, which uses its native Vincent AI system, has launched a subscription-based research platform that claims comprehensive coverage of New Zealand legal materials.

The University of Auckland has produced a helpful guide to case law research in New Zealand, including a list of New Zealand subject-specific law reports.

The New Zealand Law Reports (NZLR) functions as New Zealand’s official law report series. LexisNexis New Zealand publishes it under the authority of the New Zealand Council of Law Reporting (NZCLR). The NZLRs contain all Supreme Court decisions (often with arguments of Counsel) and select leading and significant cases of the Court of Appeal and High Court. They do not publish every decision handed down, even by the Superior Courts, and are therefore not a complete statement of New Zealand case law.

Other significant law reports include the New Zealand Administrative Reports and the Gazette Law Reports (particularly for significant decisions before 1916). Again, these are only available for purchase or via an electronic subscription from the publishers.

6.5. Judicial Review in New Zealand

The New Zealand judiciary cannot strike down primary legislation or refuse to enforce it. However, they do have other powers of judicial review. First, they can review executive action and delegated legislation to ensure public bodies operate within their statutory powers, follow appropriate procedure, and comply with natural-justice requirements. For example, where they find that an agency has not followed the appropriate decision-making process, they can order it to do so. Second, the courts can issue a formal declaration that an Act of Parliament is inconsistent with a right protected by the New Zealand Bill of Rights Act 1990. Such “Declarations of Inconsistency” do not invalidate the law at issue, but they do trigger a statutory requirement that the government issue a formal response within six months.

6.6. Note on Personal Injury Claims

A distinct feature of New Zealand’s legal system is its approach to personal injury claims. The Accident Compensation Act 1972 established a Crown entity, the Accident Compensation Corporation (ACC) (formerly, the Accident Compensation Commission), which began operating in 1974. All residents and visitors in New Zealand are covered by a comprehensive, no-fault accident compensation scheme that provides treatment, rehabilitation, and income support regardless of how an accident occurred; ACC administers this scheme. This means that individuals cannot (generally) sue for compensatory damages in tort for personal injury, including in workplace accidents or medical treatments. A narrow right to claim exemplary damages remains in common law for exceptional cases.

New Zealand’s scheme is distinctive internationally. Few other countries have opted for such a sweeping replacement of tort law–i.e., abolishing personal injury litigation in favour of a universal, state-administered compensation model.

7.1. Case Law

In addition to the general databases listed above, subscription publishers offer case citators that help access case law and see how subsequent courts have treated a case. On LexisNexis, the New Zealand citator is CaseBase. This programme also interlinks with international databases in Australia and the United Kingdom. A similar case citator is available on Westlaw (NZ).

7.2. Statute Law

The primary methods for locating statute law in New Zealand have been set out above at 4.2 and 4.3. It is also worth noting that the legal publishers (as summarised below at 7.3 each provide statutory annotators that show how legislation, including individual provisions, may have changed. Note that this comparison can also be made using the free resources, since the New Zealand Legislation website and NZLII have copies of earlier versions of statutes online. Still, the process is much more time-consuming without an annotator.

7.3. Commentary

The main publishers of legal commentary in New Zealand are LexisNexis New Zealand (sometimes under the brand ‘Butterworths’), Thomson Reuters New Zealand (sometimes under the Brookers brand), and Wolters Kluwer.

Commentary is available on a wide range of areas of New Zealand law. Leading textbooks include:

  • Stephen Todd, and Matthew Barber Burrows, Finn and Todd on the Law of Contract in New Zealand (7th ed., LexisNexis, Wellington, 2022)
  • RI Carter Burrows and Carter Statute Law in New Zealand (6th ed., LexisNexis, Wellington, 2021)
  • Andrew Butler Equity and Trusts in New Zealand (3rd ed., Thomson Reuters New Zealand 2025)
  • Stephen Todd and others, Todd on Torts (9th ed., Thomson Reuters, Wellington, 2023)
  • Philip A Joseph, Joseph on Constitutional and Administrative Law (5th ed, Thomson Reuters, Wellington 2021)
  • Scott Optican and Elisabeth McDonald eds., Mahoney on Evidence: Act and Analysis (2nd ed., Thomson Reuters, Wellington 2024)

Various “loose-leaf” services, typically subject-specific copies of annotated legislation with commentary, are also available. Most of these are typically used online where they are interconnected with the statutes provided by the legal publishers, with cross-references to the leading cases. Print copies are available from all law libraries. Major New Zealand loose-leaf commentaries include:

  • McGechan on Procedure (Westlaw)
  • Sim’s Court Practice (LexisNexis)
  • Adams on Criminal Law (Westlaw)
  • Salmon Environmental Law (Westlaw)
  • Hinde McMorland & Sim Land Law in New Zealand (LexisNexis)

Various other annotated commentaries are available online, as are e-book versions of leading legal textbooks such as Fisher on Relationship Property. New Zealand lawyers also still rely on English and, to some extent, Australian, Canadian, and American legal monographs, as well as locally published works. The New Zealand Law Society maintains useful list of leading textbooks in New Zealand across different areas of practice.

LexisNexis New Zealand produces the legal encyclopedia, The Laws of New Zealand. This is available in print and online and is relatively comprehensive, but not always up to date. As part of the international LexisNexis network, it offers the advantage of cross-references and occasionally links to and from similar legal encyclopedic works in Australia and Great Britain. In a common law setting, this is a valuable asset. It provides an excellent “first look” for a research exercise, offering immediate access to related subject matter.

Westlaw New Zealand offers an A-Z of New Zealand Law, an encyclopedia-like set of commentaries organised alphabetically. It includes extracts from its numerous legal publications and provides an overview of New Zealand law, though it is not a full encyclopedia.

Te Ara, the New Zealand encyclopedia, is available online for free. Although it is not a legal encyclopedia, it continues to provide valuable historical information and a good overview of New Zealand legal issues.

There are numerous legal journals operating within New Zealand. Additionally, many New Zealand legal scholars–perhaps most–write for both international journals and national publications. This means that a wide range of sources must be consulted for a thorough search of New Zealand legal journal literature. The New Zealand Law Society maintains a list of many New Zealand journals. A partial list of journals is set out below.

General academic reviews and journals (in alphabetical order):

  • Auckland University Law Review (University of Auckland)
  • Canterbury Law Review (University of Canterbury School of Law)
  • New Zealand Law Journal (LexisNexis).
  • New Zealand Law Review (Legal Research Foundation)
  • New Zealand Law Students’ Journal
  • New Zealand Universities Law Review (Westlaw NZ)
  • Otago Law Review (Otago Law Review Trust Board)
  • Victoria University of Wellington Law Review (Faculty of Law, Victoria University of Wellington)
  • Waikato Law Review (Te Piringa Faculty of Law, University of Waikato)

Specialist or subject-specific reviews and journals:

  • International Journal of Law & Education (ANZELA)
  • Australian and New Zealand Maritime Law Journal
  • Australian and New Zealand Sports Law Journal (ANZSLA)
  • Competition & Consumer Law Journal (LexisNexis)
  • New Zealand Business Law Quarterly (Westlaw NZ)
  • New Zealand Criminal Law Review
  • New Zealand Family Law Journal (LexisNexis)
  • New Zealand Intellectual Property Journal (LexisNexis)
  • New Zealand Journal of Public and International Law (New Zealand Centre for Public Law at the Faculty of Law, Victoria University of Wellington)
  • New Zealand Journal of Taxation Law & Policy (Westlaw NZ)
  • New Zealand Women’s Law Journal – Te Aho Kawe Kaupapa Ture a ngā Wāhine
  • New Zealand Yearbook of International Law
  • Public Interest Law Journal of New Zealand (University of Auckland)
  • Te Tai Haruru Journal of Māori and Indigenous Issues (University of Auckland)

Accessing most of these journals requires a subscription, or at least the purchase of an individual article of interest. Still, some are entirely or partly freely available online through an online search. Others are available through NZLII, which is always worth checking. Unlike statute and case law, LexisNexis and Westlaw do not carry all major journals. Journals can be found on a variety of databases, including HeinOnline and AGIS Plus Text. LexisNexis provides an indexing service for all journals received by the New Zealand Law Society Library.

7.6. International Connections

A major source of information on everything to do with New Zealand’s international relations and obligations is the Ministry of Foreign Affairs and Trade (MFAT) website, and the associated website, New Zealand Treaties Online.

New Zealand Treaties Online contains all concluded treaties (bilateral, plurilateral, multilateral, etc.), treaties in progress, and information on their dates of signature, entry into force, and current status.

The MFAT website offers a view of areas of special interest to New Zealand, such as Antarctica, the law of the sea, international fisheries, the Continental Shelf and maritime boundaries, New Zealand representation overseas, etc., which can often affect international legal developments from a New Zealand perspective.

8. Good Free Online Resources

8.1. The Parliament

Absolutely everything!

8.2. The Courts Website

The Courts of New Zealand’s official website, including their history, their operations, packaged information for legal professionals, students, and others, full-text cases and transcripts, media releases, and the judges.

8.3. NZLII

Mentioned several times, the New Zealand Legal Information Institute offers free access to a great deal of New Zealand legal information, both current and archival. This collection is growing all the time, with the addition of further information sought out by and offered to the NZLII.

8.4. Citation

New Zealand lawyers use the ubiquitous Cardiff Index to Legal Abbreviations. We also have a New Zealand-specific guide, Legal Citations of Aotearoa New Zealand (LCANZ). Also see, Legal Citations of Aotearoa New Zealand (LCANZ) Research Guide by Waipapa Taumata Rau, University of Auckland.

8.5. Style

The official style for all New Zealand legal writing is: A Coppard, G McLay, C Murray and J Orpin-Dowell New Zealand Law Style Guide (3rd ed., Thomson Reuters, Wellington, 2018).

8.6. Law Society Libraries

This collaboration among the Law Society libraries of Auckland, Wellington, and Christchurch is responsible for producing the LINX database and maintaining the physical and online collections.

8.7. The New Zealand Law Society

The New Zealand Law Society maintains a “Free legal resources” database with links to many of the sources referred to in this article (and more). Beyond this, their website offers the public information about the legal landscape in New Zealand, including legal news, overviews of specific areas of law, and guidance on finding a lawyer.

8.8. University Law Libraries

Each of these provides a lot of useful online help to members (some of their online resources are free to the public). Most have helpful guides to New Zealand legal research.