There are ten annexes to the project. The first is a protocol to maintain an open border between the EU and the UK on the island of Ireland (commonly known as the „Irish backstop“). The second concerns the modalities of a common customs territory between the EU and the UK until a technical solution can be found that offers both an open border and an independent customs policy. The third concerns operations in the common customs territory. The fourth concerns „good governance in the areas of taxation, environmental protection, social and labour standards, state aid, competition and public enterprises. The fifth to eighth provisions concern relevant provisions of EU law. The ninth and tenth sections describe the procedures resulting from the main sections of the project. (*2) In the event of an extension, the Union shall notify the other parties to the international agreements. The transition period aims to give time to adapt to the time that will become the future relationship between the EU and the UK from 1 January 2021. The timeline for implementing the content of the future relationship is very tight.
You can find out more about the negotiations on the future relationship at the following page: Communication from the Commission – Criteria for assessing the compatibility of State aid for training subject to individual notification (31) Article 1 of the Protocol on Privileges and Immunities applies to Union premises, buildings, assets and assets in the United Kingdom used by the Union before the end of the transition period. until they are no longer officially used or have been removed from the United Kingdom. The Union shall notify the United Kingdom when its premises, buildings, property or assets are no longer in use or have been removed from the United Kingdom. If the Joint Committee so decides within 6 months of receipt of the information provided by the Union in accordance with paragraph 1, Part II of Annex I to this Agreement shall not be aligned with the act referred to in the first subparagraph of this paragraph. The Irish backstop will be lifted and replaced by a new Protocol on Northern Ireland/Republic of Ireland. The whole of the UK will leave the EU customs union as a single customs territory, with Northern Ireland included in all future UK trade agreements. However, Northern Ireland adopts EU single market rules for goods (including EU VAT) to avoid a hard border and remains a point of entry into the EU customs union.  This leads to a de jure customs border on the island of Ireland, but de facto to a customs border along the Irish Sea.