# 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 3: Samples must be subjected to laboratory testing by serological methods, when taken for:

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

(a) complementary surveillance for HPAI in poultry species which generally do not show significant clinical signs of HPAI referred to in Section 5 supplementing virological testing, as appropriate;
(b) detection of clusters of LPAIV infected establishments referred to in Section 6. When for technical reasons or other duly justified reasons sampling for serology is not appropriate, virological testing must be performed.

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Source: https://www.legislation.gov.uk/eur/2020/689/annex/II/section/9/division/3 (the official version)
Page: https://openlegislation.uk/eu-regulation-2020-689/annex-II/section-9/division-3
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.