Donner, A. Keywords: European Communities | Court of Justice of the European Communities | Preliminary rulings | Mots clefs: Communautés européennes | Cour de justice des Communautés européennes | Questions préjudicielles | ABSTRACT Andre Donner points out that, whatever the extent to which domestic jurisdictions are called upon to apply and interpret community law, a sentencing decision of the court can never hinder the functioning of the ordinary market, a matter which remains reserved for the exclusive discretion of the ordi…