{
  "contract": {
    "agency_name": "Department of Defence",
    "amendment_count": 3,
    "category_code": "77100000",
    "contract_end_date": "2024-11-30",
    "contract_id": "CN4005673",
    "contract_start_date": "2023-09-20",
    "currency": "AUD",
    "current_reported_value": "8510813.86",
    "description": "Remediation Services",
    "events": [
      {
        "absolute_change": "1485210.15",
        "adaptation_notice": "Adapted and normalised by ContractDelta AU from AusTender Contract Notice data.",
        "after_release_id": "prod-5513e08d81db4a989f170e9d25cfd0d6-8b622f001c0c3b568066219e33c01dff",
        "after_source_hash": "96ec2079535790de75f7f1e365c11a90f39141f100d2c1ee2a3b3f2e34bef701",
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        "before_source_hash": "179081ba26d8179aa14bd59daf685eb8980c6d7c98e6f40a107867bd47ce7999",
        "contract_id": "CN4005673",
        "detected_at": "2025-07-22T03:53:39Z",
        "direction": "increase",
        "duration_change_days": null,
        "event_id": "5fb9fc653c73bfabab73fd812d88e3c8e9f56f98a3c4e3ae8febbe9c70d83573",
        "field_label": "Reported Value",
        "field_name": "reported_value",
        "new_value": "6485210.16",
        "notice_id": "CN4005673-A1",
        "official_record_url": "https://www.tenders.gov.au/Cn/Show/4cf22f40-a327-4591-add5-443379df64f8",
        "old_value": "5000000.01",
        "percentage_change": "29.70",
        "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/CN4005673",
        "summary": "Reported contract value increased by $1,485,210.15 (+29.70%)."
      },
      {
        "absolute_change": "2243303.92",
        "adaptation_notice": "Adapted and normalised by ContractDelta AU from AusTender Contract Notice data.",
        "after_release_id": "prod-5513e08d81db4a989f170e9d25cfd0d6-07eaaa9c1016376ab23e7685b4e36c62",
        "after_source_hash": "c56fbd129cd53c72b59edf78b2772eb01fc89c1df3ae0e51462605ea4138b1a5",
        "before_release_id": "prod-5513e08d81db4a989f170e9d25cfd0d6-8b622f001c0c3b568066219e33c01dff",
        "before_source_hash": "96ec2079535790de75f7f1e365c11a90f39141f100d2c1ee2a3b3f2e34bef701",
        "contract_id": "CN4005673",
        "detected_at": "2025-07-22T03:53:39Z",
        "direction": "increase",
        "duration_change_days": null,
        "event_id": "a56271b64b1bb7e3abb8cdf455ef7ee5e30faf5c8ebd4262039f440ccb4ea203",
        "field_label": "Reported Value",
        "field_name": "reported_value",
        "new_value": "8728514.08",
        "notice_id": "CN4005673-A2",
        "official_record_url": "https://www.tenders.gov.au/Cn/Show/11cea807-a686-4ad4-ab6a-9087a6e3753f",
        "old_value": "6485210.16",
        "percentage_change": "34.59",
        "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/CN4005673",
        "summary": "Reported contract value increased by $2,243,303.92 (+34.59%)."
      },
      {
        "absolute_change": "-217700.22",
        "adaptation_notice": "Adapted and normalised by ContractDelta AU from AusTender Contract Notice data.",
        "after_release_id": "prod-5513e08d81db4a989f170e9d25cfd0d6-70e3de2b6e8939df935f41a22948e161",
        "after_source_hash": "3d1dd40a68b088baa42580801d9693d93d3f2295872957c6b332027eaa77de45",
        "before_release_id": "prod-5513e08d81db4a989f170e9d25cfd0d6-07eaaa9c1016376ab23e7685b4e36c62",
        "before_source_hash": "c56fbd129cd53c72b59edf78b2772eb01fc89c1df3ae0e51462605ea4138b1a5",
        "contract_id": "CN4005673",
        "detected_at": "2025-07-22T03:53:39Z",
        "direction": "decrease",
        "duration_change_days": null,
        "event_id": "57e31aef3db24e3b654531ac9f458a0002727f3d7781aa75a60c67da25a612bf",
        "field_label": "Reported Value",
        "field_name": "reported_value",
        "new_value": "8510813.86",
        "notice_id": "CN4005673-A3",
        "official_record_url": "https://www.tenders.gov.au/Cn/Show/fad871a7-46ee-4291-90c3-4aa12b48f15a",
        "old_value": "8728514.08",
        "percentage_change": "-2.49",
        "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/CN4005673",
        "summary": "Reported contract value decreased by $217,700.22 (-2.49%)."
      }
    ],
    "evidence_path": "evidence/CN4005673.json",
    "latest_modified_at": "2025-07-22T03:53:39Z",
    "notice_id": "CN4005673-A3",
    "official_record_url": "https://www.tenders.gov.au/Cn/Show/fad871a7-46ee-4291-90c3-4aa12b48f15a",
    "original_reported_value": "5000000.01",
    "procurement_method": "Open tender",
    "source_url": "https://api.tenders.gov.au/ocds/findById/CN4005673",
    "supplier_name": "VENTIA UTILITY SERVICES PTY LIMITED",
    "title": "4600060016",
    "value_change": "3510813.85",
    "value_change_percentage": "70.22",
    "versions": [
      {
        "agency_name": "Department of Defence",
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        "contract_end_date": "2024-11-30",
        "contract_id": "CN4005673",
        "contract_start_date": "2023-09-20",
        "currency": "AUD",
        "description": "Remediation Services",
        "notice_id": "CN4005673",
        "official_record_url": "https://www.tenders.gov.au/Cn/Show/f0c5a465-6ff0-4336-b942-4c655bc59416",
        "procurement_method": "Open tender",
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        "source_hash": "179081ba26d8179aa14bd59daf685eb8980c6d7c98e6f40a107867bd47ce7999",
        "source_modified_at": "2023-09-26T05:01:25Z",
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        "source_url": "https://api.tenders.gov.au/ocds/findById/CN4005673",
        "supplier_name": "VENTIA UTILITY SERVICES PTY LIMITED",
        "title": "4600060016"
      },
      {
        "agency_name": "Department of Defence",
        "category_code": "77100000",
        "contract_end_date": "2024-11-30",
        "contract_id": "CN4005673",
        "contract_start_date": "2023-09-20",
        "currency": "AUD",
        "description": "Remediation Services",
        "notice_id": "CN4005673-A1",
        "official_record_url": "https://www.tenders.gov.au/Cn/Show/4cf22f40-a327-4591-add5-443379df64f8",
        "procurement_method": "Open tender",
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        "source_url": "https://api.tenders.gov.au/ocds/findById/CN4005673",
        "supplier_name": "VENTIA UTILITY SERVICES PTY LIMITED",
        "title": "4600060016"
      },
      {
        "agency_name": "Department of Defence",
        "category_code": "77100000",
        "contract_end_date": "2024-11-30",
        "contract_id": "CN4005673",
        "contract_start_date": "2023-09-20",
        "currency": "AUD",
        "description": "Remediation Services",
        "notice_id": "CN4005673-A2",
        "official_record_url": "https://www.tenders.gov.au/Cn/Show/11cea807-a686-4ad4-ab6a-9087a6e3753f",
        "procurement_method": "Open tender",
        "reported_value": "8728514.08",
        "source_hash": "c56fbd129cd53c72b59edf78b2772eb01fc89c1df3ae0e51462605ea4138b1a5",
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        "source_release_id": "prod-5513e08d81db4a989f170e9d25cfd0d6-07eaaa9c1016376ab23e7685b4e36c62",
        "source_url": "https://api.tenders.gov.au/ocds/findById/CN4005673",
        "supplier_name": "VENTIA UTILITY SERVICES PTY LIMITED",
        "title": "4600060016"
      },
      {
        "agency_name": "Department of Defence",
        "category_code": "77100000",
        "contract_end_date": "2024-11-30",
        "contract_id": "CN4005673",
        "contract_start_date": "2023-09-20",
        "currency": "AUD",
        "description": "Remediation Services",
        "notice_id": "CN4005673-A3",
        "official_record_url": "https://www.tenders.gov.au/Cn/Show/fad871a7-46ee-4291-90c3-4aa12b48f15a",
        "procurement_method": "Open tender",
        "reported_value": "8510813.86",
        "source_hash": "3d1dd40a68b088baa42580801d9693d93d3f2295872957c6b332027eaa77de45",
        "source_modified_at": "2025-07-22T03:53:39Z",
        "source_release_id": "prod-5513e08d81db4a989f170e9d25cfd0d6-70e3de2b6e8939df935f41a22948e161",
        "source_url": "https://api.tenders.gov.au/ocds/findById/CN4005673",
        "supplier_name": "VENTIA UTILITY SERVICES PTY LIMITED",
        "title": "4600060016"
      }
    ]
  },
  "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": "2026-07-17T05:22:06Z",
  "schema_version": "1.0",
  "source": {
    "adaptation_notice": "Adapted and normalised by ContractDelta AU from AusTender Contract Notice data.",
    "coverage": {
      "amended_contracts_discovered": 851,
      "amended_contracts_selected": 20,
      "amended_contracts_skipped": 831,
      "max_amended_contracts": 20,
      "mode": "bounded_amendments",
      "query_end": "2026-07-20T23:59:59.999999Z",
      "query_start": "2026-07-12T00:00:00Z",
      "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"
  }
}