# 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 6: The CAA must provide the Network Manager with the following data and information within agreed timescales ... to support the provision of the interrogator code allocation service:

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

(a)characteristics of Mode S interrogators as specified in Regulation (EC) No 262/2009;
(b)details of any change in the installation planning or in the operational status of Mode S interrogators or constituents that may impact on the allocation of interrogator codes to Mode S interrogators.
(c)justification to demonstrate that existing and requested allocations of interrogator codes are the minimum necessary to meet operational requirements;
(d)allocations of interrogator code that are no longer operationally required and that can be released for re-allocation within the network;
(e)reports of any actual unplanned shortfall in interrogator code allocations.

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Source: https://www.legislation.gov.uk/eur/2019/123/annex/IV/part/C/division/2/division/6 (the official version)
Page: https://openlegislation.uk/eu-regulation-2019-123/annex-IV/part-C/division-2/division-6
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.