Division 1 General Principles
United Kingdom
The categories and areas of Union competence are set out in Articles 2 to 6 TFEU. When the Treaties confer on the EU exclusive competence in a specific area, only the EU may legislate and adopt legally binding acts, the Member States being able to do so themselves only if so empowered by the EU or for the implementation of EU acts. When the Treaties confer on the EU a competence shared with the Member States in a specific area, the EU and the Member States may legislate and adopt legally binding acts in that area. The Member States shall exercise their competence to the extent that the EU has not exercised its competence. The Member States shall again exercise their competence to the extent that the EU has decided to cease exercising its competence.
As regards the conclusion of international agreements, for the policy areas listed in Article 3(1) TFEU, only the EU has the competence to act. For the policy areas listed in Article 4(2) TFEU the EU and its Member States share competence, but only the EU has the competence to act when the envisaged action is necessary to enable the Union to exercise its internal competence, or insofar as the provisions in the agreement may affect common rules or alter their scope within the meaning of Article 3(2) TFEU; insofar as this is not the case (i.e. the conditions of Article 3(2) TFEU are not met), Member States may exercise their competence to act in these policy areas.
Competences not attributed to the EU by the Treaties fall within the competences of the Member States of the EU.
The EU will duly notify any substantial modification of the extent of its competences, in accordance with Article 44 of the Protocol, without this constituting a prerequisite for the exercise of its competence in matters covered by the FCTC Protocol.