translate English to French: Nevertheless, some serious concerns were raised regarding the treatment of certain substantive issues in the draft Convention, such as freedom of contract in volume contracts, and it was suggested that those issues should receive further examination prior to finalization of the draft Convention.
Néanmoins, de vives préoccupations ont été exprimées concernant le traitement, dans le texte, de certaines questions de fond, telles que la liberté contractuelle dans les contrats de volume, et il a été proposé d'examiner ces questions de plus près avant de finaliser le projet de convention.