The period of five years is an adequate length of time, enabling the national authorities to periodically reevaluate whether the organisation in question is conducting research in a proper way.
Une pιriode de cinq ans constitue une durιe appropriιe, qui permet aux autoritιs nationales d'ιvaluer rιguliθrement si l'organisme en question mθne ses activitιs de recherche de maniθre correcte.