Translate the following English sentence to French:
"Secondly, in our opinion, the strength of this directive will stand or fall with its enforceability, the extent to which it monitors discrimination, the efficiency of the measures taken against discrimination and, as such, the importance we attach to the possibility of organising collective actions to tie sanctions in with the directive."
Deuxièmement, la force de cette directive dépend entièrement, selon nous, de son caractère contraignant, du contrôle en matière de discrimination, de l'efficacité des mesures prises contre la discrimination ; d'où l'importance que nous attachons à la possibilité d'organiser des actions collectives visant à inclure des sanctions dans la directive.