Opinion of Advocate General Sharpston delivered on 30 May 2013.

Kendrion NV v European Commission. # Appeal - Competition - Cartels - Industrial plastic bags sector -Whether the infringement by a subsidiary may be attributed to the parent company - Joint and several liability of the parent company for the payment of the fine imposed on the subsidiary - Excessive length of the proceedings before the General Court - Principle of effective legal protection. # Case C-50/12 P.