# Commission Regulation (EU) No 801/2010 of 13 September 2010 implementing Article 10(3) of Directive 2009/16/EC of the European Parliament and of the Council as regards the flag State criteria (Text with EEA relevance), Division 5: The following EF values shall be considered in order to sort black listed flag States into very high, high, medium to high or medium risk:

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

EF = 4,01 and more means very high risk
EF = 3,01 to 4,00 means high risk
EF = 2,01 to 3,00 means medium to high risk
EF = 1,01 to 2,00 means medium risk.

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Source: https://www.legislation.gov.uk/eur/2010/801/annex/division/Flag/division/5 (the official version)
Page: https://openlegislation.uk/eu-regulation-2010-801/annex/division-Flag/division-5
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.