{
  "url": "https://openlegislation.uk/gas-safety-management-regulations-1996/schedule-3/part-III/paragraph-1",
  "json_url": "https://openlegislation.uk/gas-safety-management-regulations-1996/schedule-3/part-III/paragraph-1.json",
  "legislation": "uksi/1996/551",
  "legislation_title": "Gas Safety (Management) Regulations 1996",
  "legislation_url": "https://openlegislation.uk/gas-safety-management-regulations-1996",
  "path": "schedule/3/part/III/paragraph/1",
  "kind": "paragraph",
  "number": "1",
  "heading": null,
  "text": "In this Schedule—\n“bar” means bars (absolute);\n“barg” means bars (gauge);\n“C” means degrees Celsius;\n...\n...\n...\n“gross calorific value” means the gross calorific value, expressed in MJ/ m3, of a dry gas determined on the basis that the water produced by combustion is assumed to be condensed;\n“mg/m3” means milligrams per cubic metre under the reference conditions;\n“MJ/m3” means megajoules per cubic metre under the reference conditions;\n...\n...\n“relative density” (“RD”) means the ratio of VG to VA (expressed in the same units) where—\nVG is the mass of a volume of the gas when containing no water vapour under the reference conditions; and\nVA is the mass of the same volume of air containing no water vapour under those conditions;\n...\n“WN” means the Wobbe Number of the gas, which is calculated in accordance with the following formula—\ngross calorific value÷relative density\n...",
  "extent": "E+W+S",
  "status": null,
  "version": "current",
  "annotations": [
    {
      "type": "F",
      "label": "F1",
      "text": "Words in Sch. 3 Pt. 3 para. 1 omitted (6.4.2023) by virtue of The Gas Safety (Management) (Amendment) Regulations 2023 (S.I. 2023/284), regs. 1(3), 14(4)(a)(i)"
    },
    {
      "type": "F",
      "label": "F2",
      "text": "Words in Sch. 3 Pt. 3 para. 1 omitted (6.4.2023) by virtue of The Gas Safety (Management) (Amendment) Regulations 2023 (S.I. 2023/284), regs. 1(3), 14(4)(a)(ii)"
    },
    {
      "type": "F",
      "label": "F3",
      "text": "Words in Sch. 3 Pt. 3 para. 1 omitted (6.4.2023) by virtue of The Gas Safety (Management) (Amendment) Regulations 2023 (S.I. 2023/284), regs. 1(3), 14(4)(a)(iii)"
    },
    {
      "type": "F",
      "label": "F4",
      "text": "Words in Sch. 3 Pt. 3 para. 1 inserted (6.4.2023) by The Gas Safety (Management) (Amendment) Regulations 2023 (S.I. 2023/284), regs. 1(3), 14(4)(a)(iv)"
    },
    {
      "type": "F",
      "label": "F5",
      "text": "Words in Sch. 3 Pt. 3 para. 1 substituted (6.4.2023) by The Gas Safety (Management) (Amendment) Regulations 2023 (S.I. 2023/284), regs. 1(3), 14(4)(a)(v)"
    },
    {
      "type": "F",
      "label": "F6",
      "text": "Words in Sch. 3 Pt. 3 para. 1 substituted (6.4.2023) by The Gas Safety (Management) (Amendment) Regulations 2023 (S.I. 2023/284), regs. 1(3), 14(4)(a)(vi)"
    },
    {
      "type": "F",
      "label": "F7",
      "text": "Words in Sch. 3 Pt. 3 para. 1 omitted (6.4.2023) by virtue of The Gas Safety (Management) (Amendment) Regulations 2023 (S.I. 2023/284), regs. 1(3), 14(4)(a)(vii)"
    },
    {
      "type": "F",
      "label": "F8",
      "text": "Words in Sch. 3 Pt. 3 para. 1 omitted (6.4.2023) by virtue of The Gas Safety (Management) (Amendment) Regulations 2023 (S.I. 2023/284), regs. 1(3), 14(4)(a)(viii)"
    },
    {
      "type": "F",
      "label": "F9",
      "text": "Words in Sch. 3 Pt. 3 para. 1 substituted (6.4.2023) by The Gas Safety (Management) (Amendment) Regulations 2023 (S.I. 2023/284), regs. 1(3), 14(4)(a)(ix)"
    },
    {
      "type": "F",
      "label": "F10",
      "text": "Words in Sch. 3 Pt. 3 para. 1 omitted (6.4.2023) by virtue of The Gas Safety (Management) (Amendment) Regulations 2023 (S.I. 2023/284), regs. 1(3), 14(4)(a)(x)"
    },
    {
      "type": "F",
      "label": "F11",
      "text": "Words in Sch. 3 Pt. 3 para. 1 substituted (6.4.2023) by The Gas Safety (Management) (Amendment) Regulations 2023 (S.I. 2023/284), regs. 1(3), 14(4)(a)(xi)"
    },
    {
      "type": "F",
      "label": "F12",
      "text": "Words in Sch. 3 Pt. 3 para. 1 omitted (6.4.2023) by virtue of The Gas Safety (Management) (Amendment) Regulations 2023 (S.I. 2023/284), regs. 1(3), 14(4)(a)(xii)"
    },
    {
      "type": "I",
      "label": "I1",
      "text": "Sch. 3 Pt. III para. 1 in force at 1.4.1996, see reg. 1"
    }
  ],
  "outstanding_effects": [],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/uksi/1996/551/schedule/3/part/III/paragraph/1",
    "retrieved_at": "2026-10-29T12:50:23.662832+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."
}