{
  "url": "https://openlegislation.uk/eu-regulation-2018-2066/annex-VIII/division-1",
  "json_url": "https://openlegislation.uk/eu-regulation-2018-2066/annex-VIII/division-1.json",
  "legislation": "eur/2018/2066",
  "legislation_title": "Commission Implementing Regulation (EU) 2018/2066 of 19 December 2018 on the monitoring and reporting of greenhouse gas emissions pursuant to Directive 2003/87/EC of the European Parliament and of the Council and amending Commission Regulation (EU) No 601/2012 (Text with EEA relevance)",
  "legislation_url": "https://openlegislation.uk/eu-regulation-2018-2066",
  "path": "annex/VIII/division/1",
  "kind": "division",
  "number": "1",
  "heading": "TIER DEFINITIONS FOR MEASUREMENT-BASED METHODOLOGIES",
  "text": "Measurement-based methodologies shall be approved in accordance with tiers with the following maximum permissible uncertainties for the annual average hourly emissions calculated in accordance with Equation 2 set out in section 3 of this Annex.\nTable 1\nTiers for CEMS (maximum permissible uncertainty for each tier)\nIn case of CO2, the uncertainty is to be applied to the total amount of CO2 measured. Where the biomass fraction is determined using a measurement based methodology, the same tier definition as for CO2 shall be applied to the biomass fraction.\nTier 1\nTier 2\nTier 3\nTier 4\nCO2 emission sources\n± 10 %\n± 7,5 %\n± 5 %\n± 2,5 %\nN2O emission sources\n± 10 %\n± 7,5 %\n± 5 %\nN.A.\nCO2 transfer\n± 10 %\n± 7,5 %\n± 5 %\n± 2,5 %",
  "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/2018/2066/annex/VIII/division/1",
    "retrieved_at": "2026-11-01T14:43:41.859825+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."
}