Translate the following English sentence to French:
"This mainly applies to the country of origin principle which has been mentioned many times this evening, as well as the liability of intermediaries, which is also a very important aspect of this directive."
Cela vaut surtout pour le principe du contrôle par le pays d' origine, qui a été évoqué à maintes reprises ce soir, et pour la responsabilité des intermédiaires, aspect également très important de cette directive.