This triggered Article 50 of the Treaty on the European Union, which defines the procedure for the withdrawal of an EU member state, thus opening a two-year countdown to withdrawal. On 15 November 2018, the day after the agreement and the support of the British government were presented, several members of the government resigned, including Dominic Raab, Secretary of State for leaving the European Union.  The withdrawal agreement provides for a transitional period until 31 December 2020, during which time the United Kingdom will remain in the internal market to ensure the flow of trade until a long-term relationship is concluded. If no agreement is reached by then, the UK will leave the single market without a trade deal on 1 January 2021. The withdrawal agreement is closely linked to a non-binding political declaration on future relations between the EU and the UK. 338.The wording of corrective measures in the event of non-compliance has been simplified and less reflected in the most recent text, and the new paragraph 132 simply states that “future relationships will define the conditions under which temporary corrective measures can be taken “failure to comply,” including the suspension of obligations arising from parts of an EU-UK agreement.317 The agreement was revised as part of the Johnson Ministry renegotiation in 2019. The amendments fit about 5% of the text.  223.As with the previous text, the revised declaration provides for “no tariffs, royalties, royalties or quantitative restrictions in all sectors,” although at present, in the explicit context of a free trade agreement. The reference to “ambitious customs rules” is maintained. However, instead of returning to the only customs territory provided by the Protocol on Ireland and Northern Ireland of November 2018, which would remove the need for a revision of the rules of origin (233), it is recognised that there must be “appropriate and modern rules of accompaniment” 234 329.In our report on relations between Britain and the European Union after Brexit , we have taken note of the European Parliament`s support for an association agreement. the observation that such agreements are “inherently dynamic and evolving” and stressing that the UK`s commitment to such a partnership could lead to a positive change in the tone of the negotiations.309 One of the advantages of an association agreement would be that it would be subject to a single ratification process on the part of the EU; it could also be applied on an interim basis until it is ratified.
Paragraph 120 of the political declaration, which has not been amended by the November 2018 text, indicates that the cross-cutting institutional framework could take the form of an association agreement. The British Parliament approved the draft agreement by adopting on 23 January 2020 the implementing laws (the 2020 Withdrawal Agreement Act) of the European Union (withdrawal agreement).