# Regulation (EC) No 550/2004 of the European Parliament and of the Council of 10 March 2004 on the provision of air navigation services in the single European sky (the service provision Regulation) (Text with EEA relevance), Article 10: Relations between service providers

Extent: E+W+S+N.I.

1. Air navigation service providers may avail themselves of the services of other service providers that have been certified in accordance with Article 7.
2. Air navigation service providers shall formalise their working relationships by means of written agreements or equivalent legal arrangements, setting out the specific duties and functions assumed by each provider and allowing for the exchange of operational data between all service providers in so far as general air traffic is concerned. Those arrangements shall be notified to the national supervisory authority ....
3. In cases involving the provision of air traffic services, the approval of the the national supervisory authority shall be required. In cases involving the provision of meteorological services, the approval of the the national supervisory authority shall be required if it has designated a provider on an exclusive basis in accordance with Article 9(1).

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Source: https://www.legislation.gov.uk/eur/2004/550/article/10 (the official version)
Page: https://openlegislation.uk/eu-regulation-2004-550/article-10
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.