6. Air navigation service providers designated under Articles 8 and 10 shall provide details of their cost base to the national supervisory authority. To this end, costs shall be broken down by distinguishing staff costs, operating costs other than staff costs, depreciation costs, cost of capital, exceptional costs and costs referred to in Article 30(3). For the purpose of enabling the Commission to carry out its tasks under this Regulation, the national supervisory authority shall provide this information to the Commission in accordance with the modalities defined in the implementing act referred to in Article 33.