The Court of Justice enshrined that right in its judgment of 15 May 1986 as a general principle of Union law (Case 222/84 Johnston [1986] ECR 1651; see also judgment of 15 October 1987, Case 222/86 Heylens [1987] ECR 4097 and judgment of 3 December 1992, Case C-97/91 Borelli [1992] ECR I-6313).
Borelli-ügyben 1992. december 3-án hozott ítéletet [EBHT 1992, I-6313. o.]).