Article 3
1. Spain shall take the necessary measures to recover the aid referred to in Article 1: - in the case of the guarantees, the difference between the interest rate granted and the free market rate, - in the case of the loans, guarantees called in and debts cancelled, 100 % of the amounts concerned. 2. Recovery shall be carried out in accordance with the procedures of national law. The sums to be recovered shall attract interest from the date on which the aid in question was granted. The interest must be calculated on the basis of the commercial rate, with reference to the rate used for the calculation of the subsidy equivalent in the context of regional aids.