# 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 4: In addition to the selection criteria for targeted surveillance of establishments referred to in point 3, the following risk factors must be taken into account at the establishment level:

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

(a) the kept species;
(b) the cycle and duration of production;
(c) presence of several poultry species;
(d) presence of multi-age poultry flocks;
(e) presence of long-lived poultry;
(f) practice of all-in all-out principle;
(g) length of waiting period between batches; and
(h) biosecurity practices and housing conditions.

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Source: https://www.legislation.gov.uk/eur/2020/689/annex/II/section/6/division/4 (the official version)
Page: https://openlegislation.uk/eu-regulation-2020-689/annex-II/section-6/division-4
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.