Article 4
Germany shall take all necessary measures to recover from the beneficiaries the illegally granted aid referred to in Article 2. Recovery shall be effected without delay and in accordance with national procedures, provided that they allow the immediate and effective execution of this Decision. The aid to be recovered shall include interest from the date on which the unlawful aid was at the disposal of the beneficiaries until the date of its recovery. Interest shall be calculated on the basis of the reference rate used for calculating the grant equivalent of regional aid.