Unionen har ligeledes enekompetence til at indgå internationale aftaler, når indgåelsen har hjemmel i en lovgivningsmæssig EU-retsakt, eller når den er nødvendig for at give Unionen mulighed for at udøve sin kompetence på internt plan, eller for så vidt den kan berøre fælles regler eller ændre deres rækkevidde.  
The Union shall also have exclusive competence for the conclusion of an international agreement when its conclusion is provided for in a legislative act of the Union or is necessary to enable the Union to exercise its internal competence, or insofar as its conclusion may affect common rules or alter their scope.  