In relation to legislative provisions, the following abbreviations may be used: – TEU: Treaty on European Union; – TFEU: Treaty on the Functioning of the European Union; – WA: Agreement on the Withdrawal of the UK from the EU; – CRD: Directive 200/38 on the right of citizens of the Union and their family members to move and reside freely within the territory of the Member States (the “Citizens’ Rights Directive”).