Undtagen i sager imellem Unionen og dennes ansatte kan appel ligeledes iværksættes af medlemsstater og EU-institutioner, der ikke har interveneret i den pågældende sag for Retten.  
With the exception of cases relating to disputes between the Union and its servants, an appeal may also be brought by Member States and institutions of the Union which did not intervene in the proceedings before the General Court.  