(6)To ensure an efficient use of ESMA’s budget and, at the same time, alleviate the financial burden on Member States and the Union, it is necessary to ensure that trade repositories pay at least all the costs related to their supervision. Fees should be set at a level such as to avoid a significant accumulation of deficit or surplus for activities related to trade repositories. If significant deficits or surplus become recurrent, the Commission should revise the level of the fees and charges.