1. Where competition authorities of two or more Member States have received a complaint or are acting on their own initiative under Article 81 or Article 82 of the Treaty against the same agreement, decision of an association or practice, the fact that one authority is dealing with the case shall be sufficient grounds for the others to suspend the proceedings before them or to reject the complaint. The Commission may likewise reject a complaint on the ground that a competition authority of a Member State is dealing with the case.

2. Where a competition authority of a Member State or the Commission has received a complaint against an agreement, decision of an association or practice which has already been dealt with by another competition authority, it may reject it.