# Commission Implementing Regulation (EU) No 1206/2011 of 22 November 2011 laying down requirements on aircraft identification for surveillance for the single European sky (Text with EEA relevance), Annex III: Performance requirements referred to in Article 4(4)

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

Individual systems used for the assignment of SSR codes shall have the following functional capabilities:
(a)SSR codes shall be automatically assigned to aircraft in compliance with a code allocation list agreed by the United Kingdom and Member States and coordinated with European third countries;
(b)SSR codes assigned to aircraft being transferred from air navigation service providers in neighbouring States shall be checked to see if the assignments can be retained in compliance with a code allocation list agreed by the United Kingdom and Member States and coordinated with European third countries;
(c)SSR codes shall be classified into different categories to allow for differentiated code assignment;
(d)SSR codes from the different categories referred to in point (c) shall be assigned according to the directions of flights;
(e)multiple simultaneous assignments of the same SSR code shall be made to flights operating in conflict-free directions.

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Source: https://www.legislation.gov.uk/eur/2011/1206/annex/III (the official version)
Page: https://openlegislation.uk/eu-regulation-2011-1206/annex-III
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.