Case C-533/11, Commission v Belgium, 17/10/2013, Directive 91/271/EEC, a penalty payment of EUR 859 404 “for each six-month periods by percentage corresponding to the proportion which the number of population equivalents which have been brought into compliance with the judgement (2004) by end of such period bears to the number of population equivalents which were not compliant with this judgement on the day of its delivery” and lump sum of EUR 10 million, ECLI:EU:C:2013:659