# Commission Delegated Regulation (EU) 2020/689 of 17 December 2019 supplementing Regulation (EU) 2016/429 of the European Parliament and of the Council as regards rules for surveillance, eradication programmes, and disease-free status for certain listed and emerging diseases (Text with EEA relevance), Division 1: The seasonally BTV-free status may only be established in a Member State or zone thereof if:

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

(a) the beginning and the end of the vector-free period and therefore of the seasonally BTV-free period has been demonstrated based on entomological surveillance in accordance with Section 5 of Chapter 1; and
(b) the cessation of the transmission of BTV has been demonstrated by:
(i) the implementation of surveillance in accordance with Section 2 of Chapter 1 at least for the past 12 months including one full vector activity season; and
(ii) the absence of new cases of infection with any of the serotypes 1-24 of BTV since the end of the vector activity season.

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Source: https://www.legislation.gov.uk/eur/2020/689/annex/V/chapter/5/division/1 (the official version)
Page: https://openlegislation.uk/eu-regulation-2020-689/annex-V/chapter-5/division-1
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.