Toutefois, selon la jurisprudence constante de la Cour de justice, toute restriction à la libre prestation de services doit, comme toutes les dérogations à un principe fondamental du traité, être interprétée de manière restrictive .
However, the Court of Justice has consistently held that any restriction on the freedom to provide services, such as any derogation from a fundamental principle of the Treaty, must be interpreted restrictively .