Article 7 3.

National supervisory authorities shall issue certificates to air navigation service providers where they comply with the common requirements referred to in Article 6. Certificates may be issued individually for each type of air navigation service as defined in Article 2 of the framework Regulation, or for a bundle of such services, inter alia, where a provider of air traffic services, whatever its legal status, operates and maintains its own communication, navigation and surveillance systems. The certificates shall be checked on a regular basis.