If the European Commission decides, pursuant to Article 9 of Council Regulation (EC) No 139 / 2004 of 20 January 2004 on the control of concentrations between undertakings, to refer all or part of a concentration with a European dimension to the French authorities, the undertakings concerned shall without delay send the Autorité de la concurrence a copy of the notification file for the transaction that they have sent to the Commission.