# Council Regulation (EC) No 21/2004 of 17 December 2003 establishing a system for the identification and registration of ovine and caprine animals and amending Regulation (EC) No 1782/2003 and Directives 92/102/EEC and 64/432/EEC, Division 4: The second means of identification, as provided for in Article 4(2)(b), must comply with the following criteria:

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

(a)for animals identified in accordance with point 3(a):
(i)an eartag which complies with the criteria set out in point 3(b); or
(ii)a mark on the pastern which complies with the criteria for eartags set out in point 3(b); or
(iii)a tattoo, except for animals involved in export to a Member State;
(b)for animals identified in accordance with point 3(b):
(i)an electronic identifier which complies with the criteria set out in point 3(a); or
(ii)for animals not involved in export to a Member State, an electronic identifier in the form of an electronic mark on the pastern or of an injectable transponder in accordance with the technical characteristics listed in point 6; or
(iii)where electronic identification is not obligatory, pursuant to Article 9(3):
an eartag, which complies with the criteria set out in point 3(b),
a mark on the pastern, which complies with the criteria for the eartags set out in point 3(b), or
a tattoo.

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Source: https://www.legislation.gov.uk/eur/2004/21/annex/division/A/division/4 (the official version)
Page: https://openlegislation.uk/eu-regulation-2004-21/annex/division-A/division-4
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.