# Commission Implementing Regulation (EU) 2019/123 of 24 January 2019 laying down detailed rules for the implementation of air traffic management (ATM) network functions and repealing Commission Regulation (EU) No 677/2011 (Text with EEA relevance), Division 13: The CAA shall allocate the interrogator codes to civil and military Mode S interrogators in a manner that optimises the safe and efficient operation of air traffic surveillance and civil-military coordination taking the following into account:

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

(a)the operational requirements of all operational stakeholders;
(b)Commission Regulation (EC) No 262/2009;
(c)the required management of Mode S interrogator codes in compliance with the provisions of the European principles and procedures for the allocation of Secondary Surveillance Radar Mode S Interrogator Codes (IC) (ICAO EUR Doc 024)

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Source: https://www.legislation.gov.uk/eur/2019/123/annex/IV/part/A/division/2/division/13 (the official version)
Page: https://openlegislation.uk/eu-regulation-2019-123/annex-IV/part-A/division-2/division-13
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.