translate English to French: 6.2 A commercial radio station shall keep and preserve, for a period of six years after the end of the year to which they relate, records from which a station's advertising revenues can be readily ascertained.
6.2 La station de radio commerciale tient et conserve, durant six années après la fin de l'année à laquelle ils se rapportent, les registres permettant de déterminer facilement les recettes publicitaires de la station de radio commerciale.