Judgment of the General Court (Eighth Chamber) of 19 May 2010 - Wieland-Werke and Others v Commission (Case T-11/05) Competition - Agreements, decisions and concerted practices - Copper plumbing tube industry - Decision finding an infringement of Article 81 EC - Continuous and multiform infringement - Principle that penalties must have a proper legal basis - Ne bis in idem principle - Fines - Actual impact on the market - Size of the relevant market - Duration of the infringement - Attenuating circumstances 1. Community law - General principles of Community law - Legal certainty - Principle that penalties must have a proper legal basis (see paras 58-63) 2. Competition - Fines - Amount - Determination - Discretion conferred on the Commission by Article 23(2) of Regulation No 1/2003 - Infringement of the principle that penalties must have a proper legal basis - None (Council Regulation No 1/2003, Art. 23(2) and (3)) (see paras 64-72) 3. Competition - Administrative procedure - Commission decision finding an infringement - Previous decision finding an infringement committed by the same undertaking - Infringements concerning markets for different though related products - No links of conditionality or coordination between the two infringements - No overall plan designed to distort competition - No identity of the infringements forming the subject-matter of the two decisions - Breach of the ne bis in idem principle - None (Art. 81 EC) (see paras 81-83, 87) 4. Competition - Administrative procedure - Powers of the Commission - Power to split a procedure (Art. 81 EC) (see para. 101) 5. Competition - Fines - Guidelines on the method of setting fines - Calculation method taking various elements of flexibility into account (Art. 229 EC; Council Regulations No 17, Art. 15(2), and No 1/2003, Art. 23(2); Commission Communication 98/C 9/03) (see paras 108-112) 6. Competition - Fines - Amount - Determination - Deterrent effect - Assessment - Obligation to penalise more lightly an undertaking which simultaneously participated in several infringements - None (Council Regulations No 17, Art. 15, and No 1/2003, Art. 23) (see paras 114-115) 7. Competition - Administrative procedure - Statement of objections - Necessary content (Council Regulations No 17 and No 1/2003) (see paras 129-131) 8. Competition - Fines - Amount - Determination - Criteria - Gravity of the infringement - Horizontal cartel concerning prices - Market-sharing arrangement - Very serious infringement (Art. 81(1) EC; Council Regulations No 17, Art. 15, and No 1/2003, Art. 23) (see paras 138-140) 9. Competition - Fines - Amount - Determination - Criteria - Gravity of the infringement - Actual impact on the market to be taken into account (Council Regulations No 17, Art. 15, and No 1/2003, Art. 23; Commission Communication 98/C 9/03, Section 1A) (see paras 143-149) 10. Competition - Fines - Amount - Determination - Criteria - Gravity of the infringement - Size of the market for the products in question - To be taken into consideration (Council Regulations No 17, Art. 15(2), and No 1/2003, Art. 23(2); Commission Communication 98/C 9/03, Section 1A) (see paras 160-163) 11. Competition - Fines - Amount - Determination - Criteria - Gravity of the infringement - Observance of the principle of proportionality (Council Regulations No 17, Art. 15(2), and No 1/2003, Art. 23(2)) (see para. 166) 12. Competition - Fines - Decision imposing fines - Duty to state reasons - Scope (Art. 253 EC; Council Regulations No 17, Art. 15(2), and No 1/2003, Art. 23(2)) (see paras 177, 179) 13. Competition - Fines - Amount - Determination - Deterrent effect - Account taken of the size and global resources of the fined undertaking (Council Regulations No 17, Art. 15(2), and No 1/2003, Art. 23(2); Commission Communication 98/C 9/03, Section 1A) (see paras 189-190, 192) 14. Competition - Fines - Amount - Determination - Criteria - Duration of the infringement - Infringements of long duration - Increase of 10% of the starting amount per year (Council Regulations No 17, Art. 15(2), and No 1/2003, Art. 23(2); Commission Communication 98/C 9/03, Section 1B) (see paras 203, 205-206) 15. Competition - Fines - Amount - Determination - Criteria - Gravity of the infringement - Mitigating circumstances (Council Regulations No 17, Art. 15(2), and No 1/2003, Art. 23(2); Commission Communication 98/C 9/03) (see para. 227) Re: APPLICATION, first, for annulment of Commission Decision C(2004) 2826 of 3 September 2004 relating to a proceeding pursuant to Article 81 [EC] and Article 53 of the EEA Agreement (Case COMP/E-1/38.069 - Copper plumbing tubes); second, in the alternative, for reduction of the fines imposed on the applicants by that decision; and third, by way of counterclaim by the Commission, for those fines to be increased. Operative part The Court: 1. Dismisses the action; 2. Dismisses the European Commission's counterclaim; 3. Orders Wieland-Werke AG, Buntmetall Amstetten GmbH and Austria Buntmetall AG to bear their own costs and to pay 90% of the costs incurred by the Commission; 4. Orders the Commission to bear 10% of its own costs; 5. Orders the Council of the European Union to bear its own costs.