{
  "url": "https://openlegislation.uk/eu-directive-2001-82/annex-I/title-II/part-4/chapter-II/division-B/division-1",
  "json_url": "https://openlegislation.uk/eu-directive-2001-82/annex-I/title-II/part-4/chapter-II/division-B/division-1.json",
  "legislation": "eudr/2001/82",
  "legislation_title": "Directive 2001/82/EC of the European Parliament and of the Council of 6 November 2001 on the Community code relating to veterinary medicinal products",
  "legislation_url": "https://openlegislation.uk/eu-directive-2001-82",
  "path": "annex/I/title/II/part/4/chapter/II/division/B/division/1",
  "kind": "division",
  "number": "1",
  "heading": "In principle, demonstration of efficacy shall be undertaken under well-controlled laboratory conditions by challenge after administration of the immunological veterinary medicinal product to the target animal under the recommended conditions of use. Insofar as possible, the conditions under which the challenge is carried out shall mimic the natural conditions for infection. Details of the challenge strain and its relevance shall be provided.",
  "text": "For live vaccines, batches containing the minimum titre or potency shall be used unless justified. For other products, batches containing the minimum active content shall be used unless otherwise justified.",
  "extent": "E+W+S+N.I.",
  "status": null,
  "version": "current",
  "annotations": [
    {
      "type": "F",
      "label": "F1",
      "text": "Substituted by Commission Directive 2009/9/EC of 10 February 2009 amending Directive 2001/82/EC of the European Parliament and of the Council on the Community code relating to medicinal products for veterinary use (Text with EEA relevance)."
    }
  ],
  "outstanding_effects": [],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/eudr/2001/82/annex/I/title/II/part/4/chapter/II/division/B/division/1",
    "retrieved_at": "2026-11-01T15:22:59.567754+00:00"
  },
  "licence": "Open Government Licence v3.0",
  "licence_url": "https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/",
  "attribution": "Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives."
}