Commission Decision of 1 December 2014 on the United Kingdom 's wish to participate in acts in the field of police cooperation and judicial cooperation in criminal matters adopted before the entry into force of the Treaty of Lisbon and which are not part

Full title: "Commission Decision of 1 December 2014 on the notification by the United Kingdom of Great Britain and Northern Ireland of its wish to participate in acts of the Union in the field of police cooperation and judicial cooperation in criminal matters adopted before the entry into force of the Treaty of Lisbon and which are not part of the Schengen acquis".

Making use of the specific provisions of Article 10 of Protocol 36 attached to the Treaty, the UK in July 2013 decided to use its right to exercise a block 'opt-out', as of 1 December 2014, from all EU acts adopted under the former third pillar which had not been amended since the entry into force of the Lisbon Treaty. On 20 November 2014, the UK notified its wish to opt-back-in to 35 of these instruments.  In practice, that means that the Council, acting unanimously, decides on the re-participation of the UK to ex-third pillar measures related to the Schengen acquis, while the Commission decides on the UK's re-participation in the non-Schengen ex-third pillar acts. The later, which are the object of this Commission Decision, include the European Arrest Warrant, Europol and Eurojust.

In order to help clarifying the situation, a list of ex-third pillar acquis which ceases to apply to the UK as of 1 December, as well as a list of ex-third pillar acquis which has been "lisbonised" for the UK (i.e. amended post-Lisbon by an act in which the UK is bound) have been published in the Official Journal for information.