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European Communities Act 1972 (UK)

The European Communities Act 1972 (c. 68) also known as the ECA 1972 is an Act of the Parliament of the United Kingdom which made legal provision for the accession of the United Kingdom to the three European Communities, namely the EEC (or "Common Market"), Euratom, and the (now defunct) Coal and Steel Community.[1]

European Communities Act 1972
Act of Parliament
Long titleAn Act to make provision in connection with the enlargement of the European Communities to include the United Kingdom, together with (for certain purposes) the Channel Islands, the Isle of Man and Gibraltar.
Citation1972 c. 68
Introduced byGeoffrey Rippon
Chancellor of the Duchy of Lancaster

Quintin Hogg, Baron Hailsham of St Marylebone
Lord Chancellor
Territorial extentUnited Kingdom
(England and Wales, Scotland, Northern Ireland)

The Isle of Man
The Bailiwick of Jersey
The Bailiwick of Guernsey
(by implication of the wording of long title and Sections 2(6) and 4(4))
Royal assent17 October 1972
Commencement17 October 1972
(partly in force)
1 January 1973
(wholly in force)
Other legislation
Amended byEuropean Communities (Amendment) Act 1986
European Economic Area Act 1993
European Communities (Amendment) Act 1993
European Communities (Amendment) Act 1998
European Communities (Amendment) Act 2002
European Union (Amendment) Act 2008
European Union Act 2011
European Union (Notification of Withdrawal) Act 2017
Repealed byEuropean Union (Withdrawal) Act 2018
Relates toReferendum Act 1975
European Assembly Elections Act 1978
European Parliamentary Elections Act 1993
European Parliamentary Elections Act 1999
European Parliamentary Elections Act 2002
European Union Referendum Act 2015
Status: Amended
Text of statute as originally enacted
Revised text of statute as amended
Royal Coat of Arms of the United Kingdom (HM Government).svg
Treaty of Union1706
Acts of Union1707
Wales and Berwick Act1746
Irish Constitution1782
Acts of Union1800
Parliament Act1911
Government of Ireland Act1920
Anglo-Irish Treaty1921
Royal and Parliamentary Titles Act1927
Statute of Westminster1931
United Nations Act1946
Parliament Act1949
EC Treaty of Accession1972
NI (Temporary Provisions) Act1972
European Communities Act1972
Local Government Act1972
Local Government (Scotland) Act1973
NI Border Poll1973
NI Constitution Act1973
Referendum Act1975
EC Membership Referendum1975
Scotland Act1978
Wales Act1978
Scottish Devolution Referendum1979
Welsh Devolution Referendum1979
Local Government (Wales) Act1994
Local Government etc. (Scotland) Act1994
Referendums (Scotland & Wales) Act1997
Scottish Devolution Referendum1997
Welsh Devolution Referendum1997
Good Friday Agreement1998
Northern Ireland Act1998
Government of Wales Act1998
Human Rights Act1998
Scotland Act1998
Government of Wales Act2006
Northern Ireland Act2009
Welsh Devolution Referendum2011
European Union Act2011
Fixed-term Parliaments Act2011
Scotland Act2012
Edinburgh Agreement2012
Scottish Independence Referendum2014
Wales Act2014
European Union Referendum Act2015
EU Membership Referendum2016
Scotland Act2016
Wales Act2017
EU (Notification of Withdrawal) Act2017
Invocation of Article 502017
European Union (Withdrawal) Act2018

The Treaty of Accession was signed by the Conservative Prime Minister Edward Heath and the President of the European Commission Franco Maria Malfatti in Brussels on 22 January 1972; the UK's accession into the Communities was subsequently ratified via the 1972 Act.

The Act provided for the incorporation into UK law of the whole of European Community law and its "acquis communautaire": its Treaties, Regulations and Directives, together with judgments of the European Court of Justice.

By the Act, Community Law (subsequently European Union Law) became binding on all legislation passed by the UK Parliament (and also upon the UK's devolved administrations—the Northern Ireland Assembly, Scottish Parliament and National Assembly for Wales—although none of these institutions existed at the time of the passing of the Act). Arguably the most significant statute to be passed by the Heath government of 1970-74, the Act is also one of the most significant UK constitutional statutes ever passed.

The act has been significantly amended from its original form, incorporating the changes wrought by the Single European Act, the Maastricht Treaty, the Amsterdam Treaty, the Nice Treaty, and the Treaty of Lisbon.

On 13 July 2017, the then Brexit Secretary, David Davis, introduced what became the European Union (Withdrawal) Act to Parliament which, as enacted, makes provision for repealing the 1972 Act on "exit day", defined as 29 March 2019 (at 11 pm).


Origin and backgroundEdit

When the European Communities (EC) came into being in 1958, the UK chose to remain aloof and instead join the alternative bloc, EFTA. Almost immediately the British government regretted its decision, and in 1961, along with Denmark, Ireland and Norway, the UK applied to join the three Communities. However, President Charles de Gaulle saw British membership as a Trojan horse for US influence, and vetoed it; all four applications were suspended. The four countries resubmitted their applications in 1967, and the French veto was lifted upon Georges Pompidou succeeding de Gaulle in 1969.[2] In 1970, accession negotiations took place between the UK Government, led by Conservative Prime Minister Edward Heath, the European Communities and various European leaders. Despite disagreements over the CAP and the UK's relationship with the Commonwealth, terms were agreed. In October 1971, after a lengthy Commons debate, MPs voted 356-244 in favour of joining the EEC.

For the Treaty to take effect upon entry into the Communities on 1 January 1973, and for the UK to embrace the EEC Institutions and Community law, an Act of Parliament was required. Only three days after the signing of the Treaty, a European Communities Bill of just 12 clauses[3] was presented to the House of Commons by Geoffrey Rippon. The European Communities Act came into being, and Edward Heath signed the Treaty of Accession in Brussels on 22 January 1972. Denmark and Ireland also joined the Community on the same day, 1 January 1973, as the UK; the Norwegian people had rejected membership in a referendum in 1972.

First Reading (House of Commons)Edit

The European Communities Bill was introduced the House of Commons for its first reading by Geoffrey Rippon, Chancellor of the Duchy of Lancaster on 26 January 1972.

Second Reading (House of Commons)Edit

On 17 February 1972, the House of Commons voted narrowly by 309-301 in favour of the Bill at its second reading, after three days of intense debate. Just before the vote the Prime Minister Edward Heath argued his case in the debate with the following words.

The Bill then passed on to Committee Stage before its third reading.

Third Reading (House of Commons)Edit

On 13 July 1972, the House of Commons voted 301-284 in favour of the Bill in its third and final reading before passing on to the House of Lords. Before the vote took place, Geoffrey Rippon (who had drafted the Bill) argued in the House of Commons immediately before the vote:

The Bill then passed to the House of Lords before receiving Royal Assent.

Royal assentEdit

The Act received Royal Assent on 17 October, and the UK's instrument of ratification of the Treaty of Accession was deposited the next day—although the Act and the Treaty did not become law until 1 January 1973, when the United Kingdom officially became a member state of the European Communities (subsequently the European Union) along with Denmark and the Republic of Ireland.

The ActEdit

The Act was the most significant constitutional piece of legislation to be passed by the Heath Government of 1970-74
Geoffrey Rippon was responsible for drafting the 1972 legislation that took the UK into the then European Communities

The European Communities Act was the instrument whereby the UK was able to join the European Union (then known as the European Communities). It enables, under section 2(2), UK government ministers to lay regulations before Parliament to transpose EU Directives (then Community law) and rulings of the European Court of Justice into UK law. It also provides, in section 2(4), that all UK legislation, including primary legislation (Acts of Parliament) have effect "subject to" directly applicable EU law. This has been interpreted by UK courts as granting EU law primacy over domestic UK legislation.

European Economic Community (EEC)Edit

The Act legislated for the United Kingdom's accession to the European Economic Community (EEC), which was at the time the main international organisation of the three Communities (more commonly known at the time as the Common Market) and incorporated its rules and regulations into the domestic law of the United Kingdom.

European Coal and Steel Community (ECSC)Edit

The Act legislated for the United Kingdom's accession to the European Coal and Steel Community (ECSC) and incorporated its rules and regulations into the domestic law of the United Kingdom.

European Atomic Energy Community (EAEC or Euratom)Edit

The Act legislated for the United Kingdom's accession to the European Atomic Energy Community (EAEC or Euratom) and incorporated its rules and regulations into the domestic law of the United Kingdom.

European TreatiesEdit

The Act incorporated the following treaties into the domestic law of the United Kingdom.

The following treaties were added to the act though subsequent amendments.

Common Agricultural PolicyEdit

The Act legislated for the full participation of the United Kingdom in the Common Agricultural Policy and fully incorporates the policy into UK domestic law. It repealed previous pieces of UK domestic legislation to allow for this.

Common Fisheries PolicyEdit

The Act legislated for the full participation of the United Kingdom in the Common Fisheries Policy and fully incorporates the policy into UK domestic law.

Customs UnionEdit

The Act legislated for the incorporation and full participation of the United Kingdom within the European Union Customs Union (then European Communities Customs Union) into domestic law, as well as the application of the European common external tariff to all goods which come into the UK from outside the European Communities. The Act repealed large sections of previous UK domestic legislation to allow for this.


The primacy and direct effect of EU law has no formal basis in the founding treaties of the union, but was developed by the European Court of Justice (ECJ), long before UK accession, on the grounds that the purpose of the treaties would be thwarted if EU law were subordinate to national law. The view of the ECJ is that any norm of EU law takes precedence over national law, including national constitutions. Most national courts, including the United Kingdom's, do not accept this monist perspective.[4] The British constitution is based on Parliamentary sovereignty and has a dualist view of international law: international treaties do not become part of UK domestic law unless they are incorporated into UK law by an Act of Parliament.[5] The primacy of EU law in the United Kingdom derives from the European Communities Act. This means that if the Act were repealed, any EU law (unless it has been transposed into British legislation) would, in practice, become unenforceable in the United Kingdom and Gibraltar, and the powers delegated by the Act to the EU institutions would return to the Parliament of the United Kingdom.[6] This was made clear to be the law in the United Kingdom by the inclusion of the "sovereignty clause" in the EU Act 2011 passed by the British Parliament.

The question of sovereignty had been discussed in an official document (FCO 30/1048) that became available to the public in January 2002 under the Thirty-year rule. It listed among "Areas of policy in which parliamentary freedom to legislate will be affected by entry into the European Communities": Customs duties, Agriculture, Free movement of labour, services and capital, Transport, and Social Security for migrant workers. The document concluded (paragraph 26) that it was advisable to put the considerations of influence and power before those of formal sovereignty.[7]


In the House of Lords Factortame case, Lord Bridge confirmed that section 2(4) of the ECA effectively automatically inserts a virtual (implied) clause into all UK statutes, that they are to be automatically disapplied wherever they come into conflict with European law. This is seen by some[who?] as a departure from the British constitutional doctrine of Westminster parliamentary sovereignty as it was and had been traditionally understood.[8]


The United Kingdom voted for withdrawal from the European Union in the 2016 EU referendum held on 23 June 2016, and afterwards there was speculation that the act would be either repealed or amended.[9] In October 2016, Prime Minister Theresa May promised a "Great Repeal Bill" which would repeal the 1972 Act and import its regulations into UK law, with effect from the date of British withdrawal; the regulations could then be amended or repealed on a case-by-case basis.[10]

The European Union (Withdrawal) Bill was introduced in the House of Commons on 13 July 2017. It was passed by Parliament on 20 June 2018, and received royal assent on 26 June 2018.[11] The European Union (Withdrawal) Act 2018 provides for the repeal of the European Communities Act 1972 at the time the United Kingdom exits the EU, on 29 March 2019 at 11:00 pm.[12] However, in a July 2018 white paper, the government announced its intention to amend the Withdrawal Act to provide for the continued effect of the ECA until the end of the "transition period" (31 December 2020, as of July 2018), therefore allowing EU law to continue to apply in that period.[13]

See alsoEdit


  1. ^ All three of these institutions would later form part of what is now known as the European Union.
  2. ^ De Gaulle died in 1970.
  3. ^ The 12-clause Bill was criticised by some in the opposition, who had demanded a one-thousand-clause Bill that would be much harder to amend.[citation needed]
  4. ^ Craig, Paul; De Burca, Grainne (2015). EU Law: Text, Cases and Materials (6th ed.). Oxford University Press. p. 266. ISBN 978-0-19-871492-7.
  5. ^ Craig, Paul; De Burca, Grainne (2015). EU Law: Text, Cases and Materials (6th ed.). Oxford University Press. p. 365. ISBN 978-0-19-871492-7.
  6. ^ Akehurst, Michael; Malanczuk, Peter (1997). Akehurst's Modern Introduction to International Law. London: Routledge. pp. 65–66. ISBN 978-0-415-11120-1.
  7. ^ FCO 30/1048, Legal and constitutional implications of UK entry into EEC (open from 1 January 2002).[1]
  8. ^ Elliott, M. "United Kingdom: Parliamentary sovereignty under pressure". International Journal of Constitutional Law. 2 (3): 545–627. doi:10.1093/icon/2.3.545.
  9. ^ Allen Green, David (11 July 2016). "Is an Act of Parliament required for Brexit?". Financial Times. Retrieved 11 July 2016.
  10. ^ Mason, Rowena (2 October 2016). "Theresa May's 'great repeal bill': what's going to happen and when?". The Guardian. Retrieved 3 October 2016.
  11. ^ "Bill stages — European Union (Withdrawal) Act 2018 — UK Parliament". Parliament of the United Kingdom. Retrieved 1 July 2018.
  12. ^ Department for Exiting the European Union (26 June 2018). European Union (Withdrawal) Act 2018 — Explanatory Notes (PDF) (Report). p. 9. Retrieved 1 July 2018. The European Union (Withdrawal) Act repeals the ECA on the day the UK leaves the EU (defined in section 20 as 11.00pm on 29 March 2019).
  13. ^ Department for Exiting the European Union (24 July 2018). Legislating for the Withdrawal Agreement between the United Kingdom and the European Union (Report). p. 21. Retrieved 31 July 2018. On exit day (29 March 2019) the EU (Withdrawal) Act 2018 will repeal the ECA. It will be necessary, however, to ensure that EU law continues to apply in the UK during the implementation period. This will be achieved by way of transitional provision, in which the Bill will amend the EU (Withdrawal) Act 2018 so that the effect of the ECA is saved for the time-limited implementation period...The Bill will make provision to end this saving of the effect of the ECA on 31 December 2020.