generated: '2026-07-27'
method: derived
source: 'GET https://energy-rules.aemc.gov.au/api/v1/rules/{ner,ngr,nerr}/versions (probed 2026-07-27)'
note: >-
  AEMC publishes no API changelog — the Energy Rules API is undocumented and unversioned beyond its
  /api/v1 prefix. What the API does expose is the dated version history of the rule books
  themselves, which is the change record that matters to consumers of this data. The entries below
  are the current version of each rule book as returned by listRuleVersions on 2026-07-27; the full
  history (304 / 115 / 65 versions) is live at the endpoint and is not duplicated here.
scheme: rule-consolidation-number
subjects:
- rule_book: ner
  name: National Electricity Rules
  current_version: 251
  version_id: 803
  start_date: '2026-07-23'
  total_versions: 304
  history: https://energy-rules.aemc.gov.au/api/v1/rules/ner/versions?showAll=true
- rule_book: ngr
  name: National Gas Rules
  current_version: 92
  version_id: 800
  start_date: '2026-07-16'
  total_versions: 115
  history: https://energy-rules.aemc.gov.au/api/v1/rules/ngr/versions?showAll=true
- rule_book: nerr
  name: National Energy Retail Rules
  current_version: 51
  version_id: 802
  start_date: '2026-07-01'
  total_versions: 65
  history: https://energy-rules.aemc.gov.au/api/v1/rules/nerr/versions?showAll=true
human_changelog:
  rule_changes: https://www.aemc.gov.au/our-work/changing-energy-rules/rule-changes
  note: >-
    AEMC's human-facing record of rule changes. Each completed rule change eventually appears as a
    new consolidated version in the API above.