Commission Regulation (EU) No 73/2010Show full title
Commission Regulation (EU) No 73/2010 of 26 January 2010 laying down requirements on the quality of aeronautical data and aeronautical information for the single European sky (Text with EEA relevance)
2.Chapter 3, Section 3.7.1 (Horizontal reference system) of Annex 15 to the Chicago Convention — Aeronautical Information Services (Twelfth Edition — July 2004, incorporating Amendment No 34).