The Air Navigation Services and Aerodromes Unit (ANS&AU) functions in accordance with EU/National Legislation and, Standards and Recommended Practices published by the International Civil Aviation Organization (ICAO).
The European Union regulates the ATM/ANS and Aerodrome domains mainly by means of Regulations and Directives issued within the Single European Sky (SES) framework. A synthetic view of the SES Legislation, EASA rules, and other relevant EU Laws, is available here, courtesy of Eurocontrols Institute of Air Navigation Services.
The following is a list of national legislation related to ATM/ANS and Airports.
ICAO, a specialized agency of the United Nations, issues Standards and Recommended Practices (SARPs) for use in civil aviation within its member states. SARPs are published in nineteen Annexes and supported by guidance material in the form of Documents. Further details can be found here.