I Haag-programmet, som Det Europæiske Råd vedtog den 4. og 5. november 2004, behandles dette problem også, og der opfordres til at styrke samarbejdet mellem medlemsstaterne.
The Hague programme, adopted by the European Council on 4 and 5 November 2004, also tackles this problem and calls for cooperation between the Member States to be stepped up.