This date simply means that, until then, the criteria that the Commission presented will not change and that, were they to change at a later date, then this would be due to new information that had come to light showing that such and such a problem had occurred.
La date en question signifie simplement que, jusque là, les critères que la Commission a présentés ne changeront pas et que, s'ils devaient changer ultérieurement, alors ce serait en raison de la mise en évidence d'éléments nouveaux démontrant que telle ou telle dérive se serait produite.