{
  "contract": {
    "agency_name": "Department of Defence",
    "amendment_count": 6,
    "category_code": "72100000",
    "contract_end_date": "2029-12-31",
    "contract_id": "CN4029827",
    "contract_start_date": "2023-12-22",
    "currency": "AUD",
    "current_reported_value": "422376334.05",
    "description": "Building and Construction Services",
    "events": [
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        "adaptation_notice": "Adapted and normalised by ContractDelta AU from AusTender Contract Notice data.",
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        "contract_id": "CN4029827",
        "detected_at": "2025-08-21T05:59:38Z",
        "direction": "increase",
        "duration_change_days": null,
        "event_id": "bd7a6240f51520706322bac9034a263c05ac0c5ddd9b8835845af2f9cea271b1",
        "field_label": "Reported Value",
        "field_name": "reported_value",
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        "notice_id": "CN4029827-A1",
        "official_record_url": "https://www.tenders.gov.au/Cn/Show/f032c4b1-edc6-4b49-8b1b-8267a649c110",
        "old_value": "12406170.70",
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        "source_license": "https://creativecommons.org/licenses/by/3.0/au/",
        "source_publisher": "Australian Government Department of Finance",
        "source_url": "https://api.tenders.gov.au/ocds/findById/CN4029827",
        "summary": "Reported contract value increased by $2,045,961.96 (+16.49%)."
      },
      {
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        "adaptation_notice": "Adapted and normalised by ContractDelta AU from AusTender Contract Notice data.",
        "after_release_id": "prod-1b35f3d546a046d2b1fcd49e067275b1-0594195617de3b4fb5c039eeb00a1471",
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        "direction": "increase",
        "duration_change_days": null,
        "event_id": "cc37587421ae9237adc2a97bc6da47a690b526595adc72b82788a4422147b506",
        "field_label": "Reported Value",
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        "notice_id": "CN4029827-A2",
        "official_record_url": "https://www.tenders.gov.au/Cn/Show/a9d5fc20-49a7-45fb-aa17-87eb8e6c4885",
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        "source_publisher": "Australian Government Department of Finance",
        "source_url": "https://api.tenders.gov.au/ocds/findById/CN4029827",
        "summary": "Reported contract value increased by $371,903,423.00 (+2573.35%)."
      },
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        "adaptation_notice": "Adapted and normalised by ContractDelta AU from AusTender Contract Notice data.",
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        "direction": "increase",
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        "field_label": "Reported Value",
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        "notice_id": "CN4029827-A3",
        "official_record_url": "https://www.tenders.gov.au/Cn/Show/f3c6746a-24dd-4d16-8e90-2c1734bd1ef5",
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        "source_license": "https://creativecommons.org/licenses/by/3.0/au/",
        "source_publisher": "Australian Government Department of Finance",
        "source_url": "https://api.tenders.gov.au/ocds/findById/CN4029827",
        "summary": "Reported contract value increased by $36,840,342.30 (+9.54%)."
      },
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        "adaptation_notice": "Adapted and normalised by ContractDelta AU from AusTender Contract Notice data.",
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        "direction": "decrease",
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        "event_id": "88021b80cd2f6a780ddcc08e587b88fef5145811c017a55ce5ff059385e16458",
        "field_label": "Reported Value",
        "field_name": "reported_value",
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        "notice_id": "CN4029827-A4",
        "official_record_url": "https://www.tenders.gov.au/Cn/Show/32b1bdc0-b4b8-4b7b-a2cd-ab6b2ab93cce",
        "old_value": "423195897.96",
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        "source_license": "https://creativecommons.org/licenses/by/3.0/au/",
        "source_publisher": "Australian Government Department of Finance",
        "source_url": "https://api.tenders.gov.au/ocds/findById/CN4029827",
        "summary": "Reported contract value decreased by $284,365.58 (-0.07%)."
      },
      {
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        "adaptation_notice": "Adapted and normalised by ContractDelta AU from AusTender Contract Notice data.",
        "after_release_id": "prod-1b35f3d546a046d2b1fcd49e067275b1-ec17f33a5aab33a79c5749fb957bd9d9",
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        "contract_id": "CN4029827",
        "detected_at": "2025-08-21T05:59:38Z",
        "direction": "decrease",
        "duration_change_days": null,
        "event_id": "82d8ec18c326dda4cfcfede66c295eafff227f9083ebfb0262b191ff3e9ef3e1",
        "field_label": "Reported Value",
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        "notice_id": "CN4029827-A5",
        "official_record_url": "https://www.tenders.gov.au/Cn/Show/7e76a7d6-d951-4522-8b92-8299bf3e01aa",
        "old_value": "422911532.38",
        "percentage_change": "-0.04",
        "source_license": "https://creativecommons.org/licenses/by/3.0/au/",
        "source_publisher": "Australian Government Department of Finance",
        "source_url": "https://api.tenders.gov.au/ocds/findById/CN4029827",
        "summary": "Reported contract value decreased by $186,071.47 (-0.04%)."
      },
      {
        "absolute_change": "-349126.86",
        "adaptation_notice": "Adapted and normalised by ContractDelta AU from AusTender Contract Notice data.",
        "after_release_id": "prod-1b35f3d546a046d2b1fcd49e067275b1-46faee267a9434abaad4d0fcc4760ab1",
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        "contract_id": "CN4029827",
        "detected_at": "2025-08-21T05:59:38Z",
        "direction": "decrease",
        "duration_change_days": null,
        "event_id": "a9e87e380d9c427d660c7a0ddac9bef122d2d352ae36a2bd872a626355a6c1f6",
        "field_label": "Reported Value",
        "field_name": "reported_value",
        "new_value": "422376334.05",
        "notice_id": "CN4029827-A6",
        "official_record_url": "https://www.tenders.gov.au/Cn/Show/ce5a5457-1f68-45d9-9fbd-95b7debfcbd4",
        "old_value": "422725460.91",
        "percentage_change": "-0.08",
        "source_license": "https://creativecommons.org/licenses/by/3.0/au/",
        "source_publisher": "Australian Government Department of Finance",
        "source_url": "https://api.tenders.gov.au/ocds/findById/CN4029827",
        "summary": "Reported contract value decreased by $349,126.86 (-0.08%)."
      }
    ],
    "evidence_path": "evidence/CN4029827.json",
    "latest_modified_at": "2025-08-21T05:59:38Z",
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    "official_record_url": "https://www.tenders.gov.au/Cn/Show/ce5a5457-1f68-45d9-9fbd-95b7debfcbd4",
    "original_reported_value": "12406170.70",
    "procurement_method": "Open tender",
    "source_url": "https://api.tenders.gov.au/ocds/findById/CN4029827",
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    "value_change_percentage": "3304.57",
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        "source_url": "https://api.tenders.gov.au/ocds/findById/CN4029827",
        "supplier_name": "CPB CONTRACTORS PTY LIMITED",
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        "source_url": "https://api.tenders.gov.au/ocds/findById/CN4029827",
        "supplier_name": "CPB CONTRACTORS PTY LIMITED",
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      {
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        "source_url": "https://api.tenders.gov.au/ocds/findById/CN4029827",
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        "source_url": "https://api.tenders.gov.au/ocds/findById/CN4029827",
        "supplier_name": "CPB CONTRACTORS PTY LIMITED",
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      {
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        "source_url": "https://api.tenders.gov.au/ocds/findById/CN4029827",
        "supplier_name": "CPB CONTRACTORS PTY LIMITED",
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      {
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        "currency": "AUD",
        "description": "Building and Construction Services",
        "notice_id": "CN4029827-A6",
        "official_record_url": "https://www.tenders.gov.au/Cn/Show/ce5a5457-1f68-45d9-9fbd-95b7debfcbd4",
        "procurement_method": "Open tender",
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        "source_modified_at": "2025-08-21T05:59:38Z",
        "source_release_id": "prod-1b35f3d546a046d2b1fcd49e067275b1-46faee267a9434abaad4d0fcc4760ab1",
        "source_url": "https://api.tenders.gov.au/ocds/findById/CN4029827",
        "supplier_name": "CPB CONTRACTORS PTY LIMITED",
        "title": "4600064584"
      }
    ]
  },
  "disclaimer": "ContractDelta identifies changes in publicly reported procurement records. A change is not evidence of misconduct. Contract amendments can result from legitimate changes in scope, timing, pricing, reporting, or data correction.",
  "generated_at": "2026-07-31T04:07:58Z",
  "schema_version": "1.0",
  "source": {
    "adaptation_notice": "Adapted and normalised by ContractDelta AU from AusTender Contract Notice data.",
    "coverage": {
      "amended_contracts_discovered": 950,
      "amended_contracts_selected": 20,
      "amended_contracts_skipped": 930,
      "max_amended_contracts": 20,
      "mode": "bounded_amendments",
      "query_end": "2026-08-03T23:59:59.999999Z",
      "query_start": "2026-07-26T00:00:00Z",
      "selection_method": "Explicit amendment contracts were ranked by current reported value, then source modification time and contract ID. Only the highest-ranked bounded set was processed."
    },
    "license": "https://creativecommons.org/licenses/by/3.0/au/",
    "name": "AusTender OCDS API",
    "publisher": "Australian Government Department of Finance"
  }
}