Article 12
Transparency of accounts 1. Air navigation service providers, whatever their system of ownership or legal form, shall draw up, submit to audit and publish their financial accounts. These accounts shall comply with the international accounting standards adopted by the Community. Where, owing to the legal status of the service provider, full compliance with the international accounting standards is not possible, the provider shall endeavour to achieve such compliance to the maximum possible extent. 2. In all cases, air navigation service providers shall publish an annual report and regularly undergo an independent audit. 3. When providing a bundle of services, air navigation service providers shall, in their internal accounting, identify the relevant costs and income for air navigation services, broken down in accordance with Eurocontrol's principles for establishing the cost-base for route facility charges and the calculation of unit rates and, where appropriate, shall keep consolidated accounts for other, non-air-navigation services, as they would be required to do if the services in question were provided by separate undertakings. 4. Member States shall designate the competent authorities that shall have a right of access to the accounts of service providers that provide services within the airspace under their responsibility. 5. Member States may apply the transitional provisions of Article 9 of Regulation (EC) No 1606/2002 of the European Parliament and of the Council of 19 July 2002 on the application of international accounting standards(7) to air navigation service providers that fall within the scope of that regulation.