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The law of Northern Ireland is the legal system of statute and common law operating in Northern Ireland since the partition of Ireland established Northern Ireland as a distinct jurisdiction in 1921.Before 1921, Northern Ireland was part of the same legal system as the rest of Ireland.

For the purposes of private international law, the United Kingdom is divided into three distinct legal jurisdictions: England and Wales; Northern Ireland and Scotland.

Northern Ireland is a common law jurisdiction. Although its common law is similar to that in England and Wales, and partially derives from the same sources, there are some important differences in law and procedure. Northern Irish law has its roots in Irish common law before the partition of Ireland in 1921 and the Acts of Union in 1801. Following the formation of the Irish Free State (which later became the Republic of Ireland), Northern Ireland became its own devolved legal jurisdiction within the United Kingdom.

History of the law of Northern Ireland

The sources of Northern Irish law reflect Irish history and the various parliaments whose law affected the region down through the ages.

The Brehon laws

The Brehon Laws were a relatively sophisticated early Irish legal system, the practice of which was only finally wiped out during the Cromwellian conquest of Ireland. The Brehon laws were a civil legal system only – there was no criminal law. Acts that would today be considered criminal were then dealt with in a similar manner to tort law today. A perpetrator would have to compensate the victim, rather than having a punishment, such as imprisonment, imposed upon him.

Common law

Ireland was the subject of the first extension of England's common law legal system outside England.[1] While in England the creation of the common law was largely the result of the assimilation of existing customary law, in Ireland the common law was imported from England, gradually supplanting the customary law of the Irish.[2]


The current statute law of Northern Ireland comprises those Acts of the Parliament of the United Kingdom that apply to Northern Ireland and Acts of the Northern Ireland Assembly, as well as statutory instruments made by departments of the Northern Ireland Executive and the UK Government, Acts of the Parliament of Northern Ireland passed between 1921 and 1972, Acts of the Parliament of Ireland made before the Act of Union 1800, and Acts of the Parliament of England, and of the Parliament of Great Britain, extended to Ireland under Poynings' Law between 1494 and 1782.

The Northern Ireland Parliament was prorogued in 1972; from then until the establishment of the Northern Ireland Assembly following the Good Friday Agreement, the primary method of making legislation for Northern Ireland was by means of orders in council under the Northern Ireland (Temporary Provisions) Act 1972. A number of important legislative measures were adopted using the order in council procedure: this included the Criminal Evidence (Northern Ireland) Order 1988 restricting the right to silence, the Fair Employment and Treatment Order (Northern Ireland) 1998 on religious and political discrimination.


The expression "Northern Ireland legislation" is defined by statute. The Northern Ireland Act 1998 establishes the legislative competence of the Northern Ireland Assembly. It creates a distinction between excepted matters, reserved matters and other matters (which are transferred i.e. they fall within the NI Assembly's competence). The Northern Ireland Act 1998 functions as a constitution for Northern Ireland.

Section 24(5) of the Interpretation Act 1978 now reads:

In this section "Northern Ireland legislation" means—

Paragraphs (d) to (g) were substituted by paragraph 3 of Schedule 13 to the Northern Ireland Act 1998.[4]

Until 2 December 1999, paragraph 7(2) of Schedule 2 to the Northern Ireland Act 1982 provided that Orders in Council under section 38(1)(b) of the Northern Ireland Constitution Act 1973[5] were Northern Ireland legislation for the purposes of section 24 of the Interpretation Act 1978.

Section 5 of the Interpretation Act 1978 provides that in any Act, unless the contrary intention appears, the expression "Northern Ireland legislation" is to be construed according to Schedule 1 of that Act, which contains the following paragraph:

"Northern Ireland legislation" has the meaning assigned by section 24(5) of this Act. [1 January 1979][6]

The preceding paragraph applies, so far as applicable, to Acts passed on or after 1 January 1979.[7]

Primary legislation

Primary Legislation is made by the legislative branch of government. In Northern Ireland this includes the Parliament of the United Kingdom (hereafter "Westminster") and the Northern Ireland Assembly ("the Assembly"). Legislation created by the Parliament of Northern Ireland, which operated from 1921 to 1972, is still in effect.

Westminster may still legislate on any Northern Ireland matter. In contrast the Assembly cannot legislate on "Excepted" matters nor "Reserved" matters. The Assembly may legislate on devolved ("Transferred") matters and then Westminster plays no part in the enactment of such legislation.

Acts of the Northern Ireland Parliament are distinguished from Westminster Acts by the position of the phrase "Northern Ireland" inside their title.

Parliament Act title
Northern Ireland (abolished) The Subject Matter Act (Northern Ireland) 1958
United Kingdom The Subject Matter (Northern Ireland) Act 1958

The Privy Council legislates on Reserved matters through Orders in Council. Technically speaking these are secondary, or delegated legislation, and they are therefore given UK Statutory Instrument numbers. Orders in Council are however used as primary legislation.[8]

Secondary legislation

All secondary legislation is derived from primary legislation. Parliament cannot amend secondary legislation, but may reject or approve it. Secondary legislation is drafted by a branch of government:

Secondary legislation is called a statutory instrument when drafted by a Westminster department and a statutory rule when drafted by an Assembly department. Previously statutory rules were titled "statutory rules and orders".

Summary table

Date Matters Primary Secondary
1921 – present Excepted UK statute (Act) Statutory instruments
Reserved Orders in council (in effect) Orders in council (technically)
1921–1973 Transferred NI statute (Act) Statutory rules and orders
2002 – 8 May 2007[9] Orders in council (in effect) Orders in council (technically)
1974 – present NI statute (order) Statutory rules

Legal publications

See also: Legal publications

In 1979, there was a severe shortage of textbooks and of works of authority, such as annotated statutes, law reports and rules of court, because the potential readership of any legal work, no matter how general, was so small that publication was not commercially viable.[10] The only periodical dealing with the law of Northern Ireland was the Northern Ireland Legal Quarterly (NILQ),[11] a peer-reviewed quarterly journal published since 1936, published at the School of Law at Queen's University Belfast.[12]

According to the Bodleian Library at Oxford University: "There are two main series of law reports for Northern Ireland: the Northern Ireland Law Reports (NI), which began in 1925; and the Northern Ireland Judgments Bulletin (NIJB), previously known as the Blue Books, which was first published in 1970".[13][14][15][16]

The Northern Ireland Statutes Revised are printed editions of NI statutes, revised.[17]

Legal education

Both of Northern Ireland's universities offer a range of undergraduate and postgraduate law degrees:

There are specialist research centres in the two universities:

Professional legal education is offered by the Institute of Professional Legal Studies at Queen's University Belfast and the Graduate School for Professional Legal Education at Ulster University.

Criminal law

Criminal offences

Offences against the person

Main article: Offence against the person


The 1967 Abortion Act does not apply in Northern Ireland. This situation led the Northern Ireland Human Rights Commission to take judicial proceedings which led to a decision in 2015 that Northern Ireland's abortion regime violated Article 8 of the European Convention on Human Rights as it failed to allow for termination in cases of fatal foetal abnormality or when pregnancy was due to a sexual offence.[19]

Abortion was decriminalised in Northern Ireland when the relevant sections of the Offences against the Person Act 1861 were repealed in October 2019. The Abortion (Northern Ireland) Regulations 2020 commenced on 31 March 2020, authorising abortions to be carried out by a "registered medical professional".[20]

Fatal offences

Main articles: Murder and Manslaughter

As to the mens rea for murder, see section 8 of the Criminal Justice Act (Northern Ireland) 1966.

The following partial defences reduce murder to manslaughter:

See also section 6 of the Criminal Justice Act (Northern Ireland) 1966. The common law defence of provocation was abolished and section 7 of that Act repealed by section 56 of the Coroners and Justice Act 2009.

The Infanticide Act (Northern Ireland) 1939 provides a partial defence which reduces murder to infanticide.

The penalty for murder is provided by section 1(1) of the Northern Ireland (Emergency Provisions) Act 1973.

Sexual offences

Main article: Sexual offences in the United Kingdom

See also: Rape and Sexual abuse

The Sexual Offences (Northern Ireland) Order 2008 reformed the law of sex crime in Northern Ireland similarly to how the Sexual Offences Act 2003 did in England and Wales.

Non-fatal non-sexual offences

See also: Assault, Battery (crime), Common assault, Assault occasioning actual bodily harm, and Grievous bodily harm

This section needs expansion. You can help by adding to it. (March 2011)

Offences against property

Main article: Property crime

See also: Burglary

This section needs expansion. You can help by adding to it. (March 2011)

Firearms and offensive weapons

This section needs expansion. You can help by adding to it. (March 2011)

Forgery, personation and cheating

Main articles: Forgery, Personation, and Cheating (law)

This section needs expansion. You can help by adding to it. (March 2011)

Offences against the State or Crown or Government and political offences

Several of these areas of law, such as treason, defence and foreign relations, are reserved or excepted matters, meaning only Westminster has the power to legislate for them.

Abolished offences

Harmful or dangerous drugs

This section needs expansion. You can help by adding to it. (March 2011)

Offences against religion and public worship

Main article: Blasphemy law in the United Kingdom § Northern Ireland

The Criminal Justice and Immigration Act 2008 abolished the offence of blasphemy in England and Wales; this measure did not extend to Northern Ireland.

Offences against the administration of public justice

This section needs expansion. You can help by adding to it. (March 2011)

Public order offences

Offences against public morals and public policy

This section needs expansion. You can help by adding to it. (March 2011)

Protection of children and vulnerable adults

This section needs expansion. You can help by adding to it. (March 2011)

Protection of animals and the environment

This section needs expansion. You can help by adding to it. (March 2011)

Road traffic and motor vehicle offences

This section needs expansion. You can help by adding to it. (March 2011)

Participatory offences

See also: Accomplice, Aid and abet, and Inchoate offenses

Participatory offences include aiding, abetting, counselling, or procuring the act of some crime or conspiracy. It also includes being an accomplice to criminal behaviour.

This section needs expansion. You can help by adding to it. (March 2011)

Defences to crime

Criminal justice

Due to the history of political violence in Northern Ireland, there have been distinctive developments in Northern Irish criminal law and anti-terrorism procedures. These date to the Civil Authorities (Special Powers) Act (Northern Ireland) 1922, commonly called the Special Powers Act. Following the outbreak of violence in the 1960s and 1970s, the Northern Ireland (Emergency Provisions) Act 1973 introduced juryless Diplock courts to try terrorism related offences.

The Terrorism Act 2000 retains special provisions for Northern Ireland in respect of anti-terrorism law, and retains the possibility to try certain offences without a jury.

Civil law

The Defamation Act 2013 does not apply in Northern Ireland. This protections which this Act provides for free expression (e.g. the public interest defence in section 4) do not therefore apply in Northern Ireland.

Northern Irish courts have issued a small number of super-injunctions.

Discrimination law

The Government of Ireland Act 1920 prohibited religious discrimination in legislation. In 1976 the UK Parliament passed the Fair Employment (Northern Ireland) Act which prohibited religious and political discrimination in employment. The Fair Employment (Northern Ireland) Act 1989 creates a system to monitor the religious composition of the workforce so as to promote fair participation.

In 1998 the Northern Ireland Act 1998 introduced a statutory duty on designated public authorities to promote equality of opportunity on a number of grounds.

While in some aspects Northern Ireland's equality law has been in advance of developments elsewhere, there are also examples where it is not as progressive. Racial discrimination in Northern Ireland was only prohibited in 1997. The Equality Act 2010 does not apply in Northern Ireland; this means that Northern Ireland's equality legislation is split across a large number of Acts and Orders.

See also


This article needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed.Find sources: "Law of Northern Ireland" – news · newspapers · books · scholar · JSTOR (October 2007) (Learn how and when to remove this message)
  1. ^ Baker, John (2003). The Oxford History of the Laws of England, Volume VI: 1483-1558. Oxford: Oxford University Press. p. 108. ISBN 978-0-19-825817-9.
  2. ^ Hand, Geoffrey Joseph (1967). English law in Ireland, 1290–1324. Dublin: Cambridge University Press. p. 1.
  3. ^ "Interpretation Act 1978: Section 24",, The National Archives, 1978 c. 30 (s. 24)
  4. ^ "Northern Ireland Act 1998: Schedule 13",, The National Archives, 1998 c. 47 (sch. 13)
  5. ^ For the definition of "the Constitution Act" see "Northern Ireland Act 1982: Section 7",, The National Archives, 1982 c. 38 (s. 7), subsection 2
  6. ^ "Interpretation Act 1978: Schedule 1",, The National Archives, 1978 c. 30 (sch. 1)
  7. ^ "Interpretation Act 1978: Section 22",, The National Archives, 1978 c. 30 (s. 22), subsection 1, and Schedule 2, paragraph 4(1)(a)
  8. ^ "Legal order – Northern Ireland, European Judicial Network". Retrieved 25 August 2007.
  9. ^ "Acts of the Northern Ireland Assembly and Explanatory Notes". Retrieved 25 August 2007.
  10. ^ The Report of the Royal Commission on Legal Services. Cmnd 7648. October 1979. Volume I. Paragraph 42.66 to at page 704. Google Books.
  11. ^ The Report of the Royal Commission on Legal Services. Cmnd 7648. October 1979. Volume I. Paragraph 42.67 to at page 704.
  12. ^ "About the Journal". Northern Ireland Legal Quarterly. Retrieved 18 September 2020.
  13. ^ "Oxford LibGuides: Northern Ireland Law: Case law". Oxford LibGuides at Oxford University. 14 May 2014. Retrieved 18 September 2020. Text was copied from this source, which is available under a Attribution 4.0 International (CC BY 4.0) licence.
  14. ^ Northern Ireland Law Reports Archived 3 March 2016 at the Wayback Machine. LexisWeb.
  15. ^ Queen's University Belfast.
  16. ^ Cardiff Index to Legal Abbreviations Archived 31 July 2013 at the Wayback Machine.
  17. ^ "Oxford LibGuides: Northern Ireland Law: Legislation". Oxford LibGuides at Oxford University. 14 May 2014. Retrieved 18 September 2020.
  18. ^ Archbold Criminal Pleading, Evidence and Practice lists child destruction as an offence against the person
  19. ^ "NI abortion law 'breaches human rights'". BBC News. 30 November 2015. Archived from the original on 11 October 2016. Retrieved 2015-12-16.
  20. ^ "The Abortion (Northern Ireland) Regulations 2020". Retrieved 25 March 2020.
  21. ^ The Coroners and Justice Act 2009, sections 54 and 55
  22. ^ The Criminal Justice Act (Northern Ireland) 1966, section 5 (as amended by section 53 of the Coroners and Justice Act 2009)
  23. ^ The Criminal Justice Act (Northern Ireland) 1966, section 14
  24. ^ Again this is the label adopted by Archbold

Further reading