277In the present case, according to recital 673 to the contested decision, before beginning its participation in the cartel, Eni or its subsidiaries had been the addressees of previous Commission decisions concerning cartels, namely Commission Decision 86/398/EEC of 23 April 1986 relating to a proceeding under Article [81 EC] (IV/31.149 — Polypropylene) (OJ 1986 L 230, p. 1, ‘the Polypropylene decision’) and Commission Decision 94/599/EC of 27 July 1994 relating to a proceeding pursuant to Article [81 EC] (IV/31.865 — PVC) (OJ 1994 L 239, p. 14, ‘the PVC II decision’).