# Commission Delegated Regulation (EU) 2020/687 of 17 December 2019 supplementing Regulation (EU) 2016/429 of the European Parliament and the Council, as regards rules for the prevention and control of certain listed diseases (Text with EEA relevance), Division 4: The minimum number of animals to examine must be in accordance with the instructions of the competent authority and with the relevant contingency plan as referred to in Article 43 of Regulation (EU) 2016/429. The minimum number of animals to examine must take into account the disease profile and in particular:

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

(a) the expected prevalence in the establishment;
(b) the level of confidence desired of the survey results, which in any case must not be lower than 95 %; and
(c) international standards and available scientific evidence.

---
Source: https://www.legislation.gov.uk/eur/2020/687/annex/I/division/1/division/A/division/A.1/division/4 (the official version)
Page: https://openlegislation.uk/eu-regulation-2020-687/annex-I/division-1/division-A/division-A.1/division-4
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.