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Consolidated version of the Treaty on European Union

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When the UK left the EU, legislation.gov.uk published EU legislation that had been published by the EU up to IP completion day (31 December 2020 11.00 p.m.). On legislation.gov.uk, these items of legislation are kept up-to-date with any amendments made by the UK since then.

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This is the revised version from EUR-Lex dated 01/03/2020. There are no timeline of changes available for treaties, instead, previous dated versions from EUR-Lex (as pdf) can be accessed via the More Resources menu. This treaty was originally signed in Maastricht in 1992 (The Maastricht Treaty).

Article 4U.K.

1.In accordance with Article 5, competences not conferred upon the Union in the Treaties remain with the Member States.

2.The Union shall respect the equality of Member States before the Treaties as well as their national identities, inherent in their fundamental structures, political and constitutional, inclusive of regional and local self-government. It shall respect their essential State functions, including ensuring the territorial integrity of the State, maintaining law and order and safeguarding national security. In particular, national security remains the sole responsibility of each Member State.

3.Pursuant to the principle of sincere cooperation, the Union and the Member States shall, in full mutual respect, assist each other in carrying out tasks which flow from the Treaties.

The Member States shall take any appropriate measure, general or particular, to ensure fulfilment of the obligations arising out of the Treaties or resulting from the acts of the institutions of the Union.

The Member States shall facilitate the achievement of the Union's tasks and refrain from any measure which could jeopardise the attainment of the Union's objectives.

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