Treaty on European Union

The member states share a "society in which pluralism, non-discrimination, tolerance, justice, solidarity and equality between women and men prevail".

Point 5 states the EU shall promote its values, contribute to eradicating poverty, observe human rights and respect the charter of the United Nations.

Title 4 has only one article which allows a limited number of member states to co-operate within the EU if others are blocking integration in that field.

Article 22 gives the European Council, acting unanimously, control over defining the EU's foreign policy.

The first, common provisions, details the guidelines and functioning of the EU's foreign policy, including establishment of the European External Action Service and member state's responsibilities.

[2] However at least one member state (Finland) made a conclusion that due to conflicting national law, military assistance was excluded.

Article 48 deals with the method of treaty amendment; specifically the ordinary and simplified revision procedures.

In the aftermath of the Brexit vote in the UK on 23 June 2016, the United Kingdom formally invoked Article 50 in March 2017, giving notice that it would leave the EU within two years.