translate English to French: The Commission of the European Union had recently adopted a ruling the effect of which - if it were allowed to stand - was that Gibraltar would henceforth be treated as a region of the Administering Power (the United Kingdom) and would be subject to the same taxation system and taxation rates as that country.  Such a situation would gravely undermine the viability of Gibraltar's economy and its society as a whole, and the ruling was therefore going to be challenged before the European Court of Justice by the Governments of both the United Kingdom and Gibraltar.
La Commission de l'Union européenne a récemment adopté une décision< selon laquelle, si elle reste en vigueur, Gibraltar serait considéré comme l'une des régions de la Puissance administrante, le Royaume-Uni, et serait donc contraint d'avoir le même régime fiscal et les mêmes taux d'imposition que le Royaume-Uni, même si cela devait porter gravement atteinte à la vie économique et sociale du territoire.