Entry into force and application
Article 4
This Regulation shall enter into force on the day following that of its publication in the Official Journal of the European Union . It shall apply from the day following that on which the Treaties cease to apply to the United Kingdom pursuant to Article 50(3) TEU. However, this Regulation shall not apply if a withdrawal agreement concluded with the United Kingdom in accordance with Article 50(2) TEU has entered into force by the date referred to in the second paragraph of this Article.