{
  "url": "https://openlegislation.uk/eu-regulation-2014-312/article-21",
  "json_url": "https://openlegislation.uk/eu-regulation-2014-312/article-21.json",
  "legislation": "eur/2014/312",
  "legislation_title": "Commission Regulation (EU) No 312/2014 of 26 March 2014 establishing a Network Code on Gas Balancing of Transmission Networks (Text with EEA relevance)",
  "legislation_url": "https://openlegislation.uk/eu-regulation-2014-312",
  "path": "article/21",
  "kind": "article",
  "number": "21",
  "heading": "Daily imbalance quantity calculation",
  "text": "1. The transmission system operator shall calculate a daily imbalance quantity for each network user’s balancing portfolio for each gas day in accordance with the following formula:\ndaily imbalance quantity = inputs – off-takes\n2. The daily imbalance quantity calculation shall be adapted accordingly where:\n(a) a linepack flexibility service is offered; and/or\n(b) any arrangement is in place whereby network users provide gas, including gas in kind, to cover:\n(i) gas unaccounted for as off taken from the system, such as losses, metering errors; and/or\n(ii) gas used by the transmission system operator for the operation of the system, such as fuel gas\n3. Where the sum of a network user’s inputs for the gas day is equal to the sum of its off-takes for this gas day, a network user is deemed balanced for this gas day.\n4. Where the sum of a network user’s inputs for the gas day is not equal to the sum of its off-takes for this gas day, a network user is deemed imbalanced for this gas day and daily imbalance charges shall be applied in accordance with Article 23.\n5. The transmission system operator shall provide a network user with its initial and its final daily imbalance quantities in accordance with Article 37.\n6. The daily imbalance charge shall be based on the final daily imbalance quantity.",
  "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/2014/312/article/21",
    "retrieved_at": "2026-11-01T14:47:48.539232+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."
}