Translate the following English sentence to French:
"In any event, Member States have to make sure that tax treaties and all other tax law instruments prevent double-taxation of dividends in cross-border investment'."
En toute hypothèse, les États membres doivent s'assurer que les conventions fiscales et autres dispositions du droit fiscal empêchent effectivement la double imposition des dividendes de placements transfrontaliers."