On 29 March 2011, the European Court of Justice (ECJ) held that the Commission could apply the substantive rules of the European Coal and Steel Treaty to infringements that took place before that Treaty expired in July 2002. The ECJ held that it would be contrary to objectives and coherence of the Treaties if the Commission did not have jurisdiction to ensure a uniform application of the competition rules based on a succession of the competition rules under the EC Treaty to the coal and steel sectors. The Commission therefore could impose penalties for breach of the ECSC based on procedures adopted under the EC Treaty. In the Court’s view this did not give rise to a breach of the principle of ‘legal certainty’ because the companies concerned could not be unaware at the time of the consequences of their conduct. Consequently, the ECJ upheld the decision fining ArcelorMittal Luxembourg and ThyssenKrupp Nirosta €10m and €3.17m respectively.