# Commission Regulation (EC) No 262/2009 of 30 March 2009 laying down requirements for the coordinated allocation and use of Mode S interrogator codes for the single European sky (Text with EEA relevance), Article 5: Associated procedures for the CAA

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

1. The CAA shall check the validity of interrogator code applications received from Mode S operators, before making them available through the interrogator code allocation system for coordination. The validity check shall include the key items listed in Annex II, Part A.
2. The CAA shall take the necessary measures to ensure that the interrogator code allocation system:
(a) checks interrogator code applications for compliance with the format and data conventions;
(b) checks interrogator code applications for completeness, accuracy and timeliness;
(c) within maximum six calendar months from application:
(i)performs interrogator code allocation plan update simulations on the basis of the pending applications;
(ii)prepares a proposed update of the interrogator code allocation plan for approval by the CAA if the United Kingdom is affected by it;
(iii)ensures that the proposed update to the interrogator code allocation plan meets to the greatest extent possible, the operational requirements of the interrogator code applications, as described by key items (g), (h) and (i) listed in Annex II, Part A;
(iv)updates, and communicates to the CAA the interrogator code allocation plan immediately after its approval, without prejudice to ... procedures for the communication of information on Mode S interrogators operated by military.
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5. The CAA shall ensure that the United Kingdom's interrogator code allocation plan approvals are communicated to ... Member States through the interrogator code allocation system.
6. The CAA shall ensure that interrogator code allocation changes resulting from an update to the interrogator code allocation plan are communicated to the relevant Mode S operators under their authority within 14 calendar days of the reception of the updated allocation plan.
7. The CAA shall make available to ... Member States at least every six months through the interrogator code allocation system an up-to-date record of the allocation and use of interrogator code by the eligible Mode S interrogators within their area of responsibility.
8. Where an overlap exists between the coverage of a Mode S interrogator located within the area of responsibility of the United Kingdom and the coverage of a Mode S interrogator located within the area of responsibility of a third country, the CAA shall:
(a) ensure that the third country is informed of the safety requirements related to the allocation and use of interrogator codes;
(b) take the necessary measures to coordinate the use of interrogator codes with the third country.

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Source: https://www.legislation.gov.uk/eur/2009/262/article/5 (the official version)
Page: https://openlegislation.uk/eu-regulation-2009-262/article-5
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.