Translate the following English sentence to French:
"He advocates radical liberalisation of the Community's railways and refuses to grant any derogations, despite the fact that they are essential if we are to adapt gradually to new regulations."
Il prône une libéralisation radicale des chemins de fer communautaires, refusant d' accorder des périodes transitoires, pourtant indispensables pour permettre une adaptation progressive aux nouvelles réglementations.