Today (22nd Nov 2018) is published the text agreed by negotiators for the Political Declaration setting out the framework for the Future Relationship between the European Union and the United Kingdom. This document is here, and here.
(the Declaration is in the Annex starting on the second page)
The Declaration is agreed in principle at the Political level, subject to the endorsement of Leaders. It will remain a political document, and is not a legal document per se.
The text of the Declaration states that it is made under the Art 50 process set out in the EU Treaties for a member state to exit the Union, and it accompanies the Withdrawal Agreement text I posted about recently (dated 14 Nov) that has been endorsed by the EU and the UK, subject to ratification.
Clause 1 of the Declaration states :
1. The European Union, hereafter referred to as “the Union”, and the United Kingdom of Great Britain and Northern Ireland, hereafter referred to as “the United Kingdom”, (“the Parties”) have agreed this political declaration on their future relationship, on the basis that Article 50(2) of the Treaty on European Union (TEU) provides for the negotiation of an agreement setting out the arrangements for the withdrawal of a departing Member State, taking account of the framework for its future relationship with the Union. In that context, this declaration accompanies the Withdrawal Agreement that has been endorsed by the Parties, subject to ratification.
Further steps for the Withdrawal Agreement (and its accompanying Political Declaration) are :
(1) vote in the UK and EU Parliaments
(2) ratification by Leaders individually
The Withdrawal Agreement text is not reopen for change, save as respects the Transition Period extension clause, where an end date needs to be inserted. It is understood an option for two dates may be inserted, either a further 12 months to end Dec 2021 or a further 24 months to end Dec 2022. It is expected this will occur by this Sunday.
The Withdrawal Agreement is a legal document, made under EU law, which, if ratified, is international law as respects the UK after its automatic exit at end of March 2019.