1. When national courts rule on agreements, decisions or practices under Article 81 or Article 82 of the Treaty which are already the subject of a Commission decision, they cannot take decisions running counter to the decision adopted by the Commission. They must also avoid giving decisions which would conflict with a decision contemplated by the Commission in proceedings it has initiated. To that effect, the national court may assess whether it is necessary to stay its proceedings. This obligation is without prejudice to the rights and obligations under Article 234 of the Treaty.

2. When competition authorities of the Member States rule on agreements, decisions or practices under Article 81 or Article 82 of the Treaty which are already the subject of a Commission decision, they cannot take decisions which would run counter to the decision adopted by the Commission.