1. Unless otherwise provided in this Agreement, Union law shall be applicable to and in the United Kingdom during the transition period.

However, the following provisions of the Treaties, and acts adopted by the institutions, bodies, offices or agencies of the Union, shall not be applicable to and in the United Kingdom during the transition period:

(a) provisions of the Treaties and acts which, pursuant to Protocol (No 15) on certain provisions relating to the United Kingdom of Great Britain and Northern Ireland, Protocol (No 19) on the Schengen acquis integrated into the framework of the European Union or Protocol (No 21) on the position of the United Kingdom and Ireland in respect of the area of freedom, security and justice, or pursuant to the provisions of the Treaties on enhanced cooperation, were not binding upon and in the United Kingdom before the date of entry into force of this Agreement as well as acts amending such acts;

(b) Article 11(4) TEU, point (b) of Article 20(2), Article 22 and the first paragraph of Article 24 TFEU, Articles 39 and 40 of the Charter of Fundamental Rights of the European Union, and the acts adopted on the basis of those provisions.

2. In the event that the Union and the United Kingdom reach an agreement governing their future relationship in the areas of the Common Foreign and Security Policy and the Common Security and Defence Policy which becomes applicable during the transition period, Chapter 2 of Title V of the TEU and the acts adopted on the basis of those provisions shall cease to apply to the United Kingdom from the date of application of that agreement.

3. During the transition period, the Union law applicable pursuant to paragraph 1 shall produce in respect of and in the United Kingdom the same legal effects as those which it produces within the Union and its Member States, and shall be interpreted and applied in accordance with the same methods and general principles as those applicable within the Union.

4. The United Kingdom shall not participate in any enhanced cooperation:

(a) in relation to which authorisation was granted after the date of entry into force of this Agreement; or

(b) within the framework of which no acts were adopted before the date of entry into force of this Agreement.

5. During the transition period, in relation to measures which amend, build upon or replace an existing measure adopted pursuant to Title V of Part Three of the TFEU by which the United Kingdom is bound before the date of entry into force of this Agreement, Article 5 of Protocol (No 19) on the Schengen acquis integrated into the framework of the European Union and Article 4a of Protocol (No 21) on the position of the United Kingdom and Ireland in respect of the area of freedom, security and justice shall continue to apply mutatis mutandis. The United Kingdom shall not, however, have the right to notify its wish to take part in the application of new measures pursuant to Title V of Part Three of the TFEU other than those measures referred to in Article 4a of Protocol No 21.

In order to support continuing cooperation between the Union and the United Kingdom, under the conditions set out for cooperation with third countries in the relevant measures, the Union may invite the United Kingdom to cooperate in relation to new measures adopted under Title V of Part III TFEU.

6. Unless otherwise provided in this Agreement, during the transition period, any reference to Member States in the Union law applicable pursuant to paragraph 1, including as implemented and applied by Member States, shall be understood as including the United Kingdom.

7. By way of derogation from paragraph 6:

(a) for the purposes of Article 42(6) and Article 46 TEU and of Protocol (No 10) on permanent structured cooperation established by Article 42 TEU, any references to Member States shall be understood as not including the United Kingdom. This shall not preclude the possibility for the United Kingdom to be invited to participate as a third country in individual projects under the conditions set out in Council Decision (CFSP) 2017/2315(1) on an exceptional basis, or in any other form of cooperation to the extent allowed and under the conditions set out by future Union acts adopted on the basis of Article 42(6) and Article 46 TEU;

(b) where acts of the Union provide for the participation of Member States, nationals of Member States or natural or legal persons residing or established in a Member State in an information exchange, procedure or programme which continues to be implemented or which starts after the end of the transition period, and where such participation would grant access to security-related sensitive information that only Member States, nationals of Member States, or natural or legal persons residing or established in a Member State, are to have knowledge of, in such exceptional circumstances the references to Member States in such Union acts shall be understood as not including the United Kingdom. The Union shall notify the United Kingdom of the application of this derogation;

(c) for the purposes of the recruitment of officials and other servants of the institutions, bodies, offices or agencies of the Union, any references to Member States in Articles 27 and 28(a) of the Staff Regulations and in Article 1 of Annex X thereto and in Articles 12, 82 and 128 of the Conditions of Employment of Other Servants of the European Union, or in the relevant provisions of other staff rules applicable to those institutions, bodies, offices or agencies, shall be understood as not including the United Kingdom.