In order to enable the Commission to monitor the aid exempted from notification by this Regulation, Member States, or alternatively, in the case of aid granted to European Territorial Cooperation projects, the Member State in which the Managing Authority is located, shall maintain detailed records with the information and supporting documentation necessary to establish that all the conditions laid down in this Regulation are fulfilled. Such records shall be kept for 10 years from the date on which the ad hoc aid was granted or the last aid was granted under the scheme. The Member State concerned shall provide the Commission within a period of 20 working days or such longer period as may be fixed in the request, with all the information and supporting documentation which the Commission considers necessary to monitor the application of this Regulation.