Finder Domstolen, at en sag, der er indbragt for den, er af særlig vigtighed, kan den desuden efter at have hørt generaladvokaten beslutte at henvise sagen til Domstolens plenum.  
Moreover, where it considers that a case before it is of exceptional importance, the Court of Justice may decide, after hearing the Advocate-General, to refer the case to the full Court.  