{
  "url": "https://openlegislation.uk/eu-regulation-2009-631/annex/part-V/division-appendix+i/division-4/division-4.2/division-4.2.1",
  "json_url": "https://openlegislation.uk/eu-regulation-2009-631/annex/part-V/division-appendix+i/division-4/division-4.2/division-4.2.1.json",
  "legislation": "eur/2009/631",
  "legislation_title": "Commission Regulation (EC) No 631/2009 of 22 July 2009 laying down detailed rules for the implementation of Annex I to Regulation (EC) No 78/2009 of the European Parliament and of the Council on the type-approval of motor vehicles with regard to the protection of pedestrians and other vulnerable road users, amending Directive 2007/46/EC and repealing Directives 2003/102/EC and 2005/66/EC",
  "legislation_url": "https://openlegislation.uk/eu-regulation-2009-631",
  "path": "annex/part/V/division/appendix+i/division/4/division/4.2/division/4.2.1",
  "kind": "division",
  "number": "4.2.1",
  "heading": null,
  "text": "When the headform impactors are dropped from a height of 376 ± 1 mm in accordance with point 4.4. the peak resultant acceleration measured by one triaxial (or three uniaxial) accelerometer (accelerometers) in the headform impactor shall be:\n(a) for the child/small adult headform impactor not less than 245 g and not more than 300 g;\n(b) for the adult headform impactor not less than 225 g and not more than 275 g.\nThe acceleration time curves shall be uni-modal.",
  "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/2009/631/annex/part/V/division/appendix+i/division/4/division/4.2/division/4.2.1",
    "retrieved_at": "2026-11-01T14:51:23.654247+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."
}