Translate the following English sentence to French:
"A further step towards transparency and the involvement of the European Parliament came with what is known as the modus vivendi of 20 September 1994, which granted Parliament the right not only to be informed but also to intervene in certain cases."
Un pas supplémentaire en faveur de la transparence fut ensuite accompli grâce au modus vivendi du 20 septembre 1994, par lequel le Parlement européen a reçu non seulement un droit d' information mais également un certaine possibilité d' intervention.