Member States shall ensure that the compensation granted for the operation of the service of general economic interest meets the requirements set out in this Decision and in particular that the undertaking does not receive compensation in excess of the amount determined in accordance with Article 5. They shall provide evidence upon request from the Commission. They shall carry out regular checks, or ensure that such checks are carried out, at least every 3 years during the period of entrustment and at the end of that period.

Where an undertaking has received compensation in excess of the amount determined in accordance with Article 5, the Member State shall require the undertaking concerned to repay any overcompensation received. The parameters for the calculation of the compensation shall be updated for the future. Where the amount of overcompensation does not exceed 10 % of the amount of the average annual compensation, such overcompensation may be carried forward to the next period and deducted from the amount of compensation payable in respect of that period.