{
  "url": "https://openlegislation.uk/eu-regulation-2011-582/annex-XI/division-4/division-4.3/division-4.3.4/division-4.3.4.1",
  "json_url": "https://openlegislation.uk/eu-regulation-2011-582/annex-XI/division-4/division-4.3/division-4.3.4/division-4.3.4.1.json",
  "legislation": "eur/2011/582",
  "legislation_title": "Commission Regulation (EU) No 582/2011 of 25 May 2011 implementing and amending Regulation (EC) No 595/2009 of the European Parliament and of the Council with respect to emissions from heavy duty vehicles (Euro VI) and amending Annexes I and III to Directive 2007/46/EC of the European Parliament and of the Council (Text with EEA relevance)",
  "legislation_url": "https://openlegislation.uk/eu-regulation-2011-582",
  "path": "annex/XI/division/4/division/4.3/division/4.3.4/division/4.3.4.1",
  "kind": "division",
  "number": "4.3.4.1",
  "heading": "Determination of durability performance of family members",
  "text": "A replacement pollution control device A within a family and intended to be mounted on an engine of displacement CA may be considered to have the same aging factors as the parent replacement pollution control device P, determined on an engine of displacement CP, if the following conditions are fulfilled:\nVA/CA ≥ VP/CP\nwhere:\nVASubstrate volume (in dm3) of replacement pollution control device A\nVPSubstrate volume (in dm3) of the parent replacement pollution control device P of the same family; and\nboth engines use the same method for regeneration of any emissions control devices incorporated in the original exhaust after-treatment system. This requirement shall apply only where devices requiring regeneration are incorporated in the original exhaust after-treatment system.\nIf these conditions are fulfilled, the emissions durability performance of other members of the family may be determined from the emissions results (S) of that family member determined according to the requirements set out in points 4.3.2.1, 4.3.2.2 and 4.3.2.3 and using the Aging Factors determined for the parent of that family.",
  "extent": "E+W+S+N.I.",
  "status": null,
  "version": "current",
  "annotations": [],
  "outstanding_effects": [],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/eur/2011/582/annex/XI/division/4/division/4.3/division/4.3.4/division/4.3.4.1",
    "retrieved_at": "2026-11-01T14:50:03.864087+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."
}