The manager or managers of a European Economic Interest Grouping are liable, individually or jointly and severally as the case may be, to the grouping or to third parties, either for infringements of the legislative or regulatory provisions applicable to the grouping, or for breaches of the Articles of Association, or for their mismanagement. If several managing partners have cooperated in the same acts, the court shall determine the contributory share of each in the reparation of the damage.