{
  "contract": {
    "agency_name": "Department of Defence",
    "amendment_count": 5,
    "category_code": "72100000",
    "contract_end_date": "2029-06-30",
    "contract_id": "CN4104389",
    "contract_start_date": "2024-09-20",
    "currency": "AUD",
    "current_reported_value": "314723166.70",
    "description": "Construction Services",
    "events": [
      {
        "absolute_change": "37654.72",
        "adaptation_notice": "Adapted and normalised by ContractDelta AU from AusTender Contract Notice data.",
        "after_release_id": "prod-40ce696568d342d5844bf9d5861eba64-041d8b7604453aeb9cb644ede108f397",
        "after_source_hash": "889afe68b7de1827ad60508347ddeeb90c49bf440d374d19eb71c39c5a65cb05",
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        "before_source_hash": "074cd29339682cd525cb0b223de6132ca4619dcf1510fa79531a0abbdaba4104",
        "contract_id": "CN4104389",
        "detected_at": "2026-07-31T00:30:49Z",
        "direction": "increase",
        "duration_change_days": null,
        "event_id": "5600c230373e7b2ba8c197ce313053139c73bc590dbfe3282dc99781d16f2e8c",
        "field_label": "Reported Value",
        "field_name": "reported_value",
        "new_value": "2115518.22",
        "notice_id": "CN4104389-A1",
        "official_record_url": "https://www.tenders.gov.au/Cn/Show/0b500e17-e255-4d3d-9212-508b7b3b91a2",
        "old_value": "2077863.50",
        "percentage_change": "1.81",
        "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/CN4104389",
        "summary": "Reported contract value increased by $37,654.72 (+1.81%)."
      },
      {
        "absolute_change": "148500.00",
        "adaptation_notice": "Adapted and normalised by ContractDelta AU from AusTender Contract Notice data.",
        "after_release_id": "prod-40ce696568d342d5844bf9d5861eba64-aef8b63771f731fdbdd04520acece8a9",
        "after_source_hash": "5d6e0ecf55bad0d39ae5829f868381cf92a7dfcceedb1b95e8a130f9629628b3",
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        "before_source_hash": "889afe68b7de1827ad60508347ddeeb90c49bf440d374d19eb71c39c5a65cb05",
        "contract_id": "CN4104389",
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        "direction": "increase",
        "duration_change_days": null,
        "event_id": "2b186659be7436dd04c96ba14ca8a6d862f15435f15e0e6bbc988a8aaad7b557",
        "field_label": "Reported Value",
        "field_name": "reported_value",
        "new_value": "2264018.22",
        "notice_id": "CN4104389-A2",
        "official_record_url": "https://www.tenders.gov.au/Cn/Show/0415276e-80f1-48a3-806a-49413cf228ff",
        "old_value": "2115518.22",
        "percentage_change": "7.02",
        "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/CN4104389",
        "summary": "Reported contract value increased by $148,500.00 (+7.02%)."
      },
      {
        "absolute_change": "7124789.59",
        "adaptation_notice": "Adapted and normalised by ContractDelta AU from AusTender Contract Notice data.",
        "after_release_id": "prod-40ce696568d342d5844bf9d5861eba64-fb4fa72e2f1d3a3da9ff70470e41181d",
        "after_source_hash": "8ed7b8a137d8bb7451b59842143126ef175e6b4839590838f58c310574a72403",
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        "before_source_hash": "5d6e0ecf55bad0d39ae5829f868381cf92a7dfcceedb1b95e8a130f9629628b3",
        "contract_id": "CN4104389",
        "detected_at": "2026-07-31T00:30:49Z",
        "direction": "increase",
        "duration_change_days": null,
        "event_id": "c821ca5f5080828f309b32cd380897d66a4bfea3427c37b93cf4f82cc7caedb7",
        "field_label": "Reported Value",
        "field_name": "reported_value",
        "new_value": "9388807.81",
        "notice_id": "CN4104389-A3",
        "official_record_url": "https://www.tenders.gov.au/Cn/Show/377abf92-1f9d-4c53-9596-0efdf81cddfe",
        "old_value": "2264018.22",
        "percentage_change": "314.70",
        "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/CN4104389",
        "summary": "Reported contract value increased by $7,124,789.59 (+314.70%)."
      },
      {
        "absolute_change": "3065877.00",
        "adaptation_notice": "Adapted and normalised by ContractDelta AU from AusTender Contract Notice data.",
        "after_release_id": "prod-40ce696568d342d5844bf9d5861eba64-995a1b1b0c863256b9fec88b9b31658e",
        "after_source_hash": "a6293da6ad1f2a08fb44acae2fb48a6741b2a833f852ceed937f9a8c78062fe1",
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        "before_source_hash": "8ed7b8a137d8bb7451b59842143126ef175e6b4839590838f58c310574a72403",
        "contract_id": "CN4104389",
        "detected_at": "2026-07-31T00:30:49Z",
        "direction": "increase",
        "duration_change_days": null,
        "event_id": "9e7daa78b0319ae003eeeabef9cfa2896ab91d8927467ac3c0d3967de206607f",
        "field_label": "Reported Value",
        "field_name": "reported_value",
        "new_value": "12454684.81",
        "notice_id": "CN4104389-A4",
        "official_record_url": "https://www.tenders.gov.au/Cn/Show/b06aee7d-1fdf-4550-894b-9e49781872a2",
        "old_value": "9388807.81",
        "percentage_change": "32.65",
        "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/CN4104389",
        "summary": "Reported contract value increased by $3,065,877.00 (+32.65%)."
      },
      {
        "absolute_change": "302268481.89",
        "adaptation_notice": "Adapted and normalised by ContractDelta AU from AusTender Contract Notice data.",
        "after_release_id": "prod-40ce696568d342d5844bf9d5861eba64-44f31a74db2e36998f6bd9939b10dc9b",
        "after_source_hash": "821ae92c04b960d3588da816bf08afaa54efc7f703e5a81b61a809da6d26caaa",
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        "contract_id": "CN4104389",
        "detected_at": "2026-07-31T00:30:49Z",
        "direction": "increase",
        "duration_change_days": null,
        "event_id": "3dfe1298ded3e64d91c34fab0e235a2d721598ccd93366dcf9298e165f329cad",
        "field_label": "Reported Value",
        "field_name": "reported_value",
        "new_value": "314723166.70",
        "notice_id": "CN4104389-A5",
        "official_record_url": "https://www.tenders.gov.au/Cn/Show/890cb229-a5b0-43b5-9d61-1c5d06c8d1d7",
        "old_value": "12454684.81",
        "percentage_change": "2426.95",
        "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/CN4104389",
        "summary": "Reported contract value increased by $302,268,481.89 (+2426.95%)."
      }
    ],
    "evidence_path": "evidence/CN4104389.json",
    "latest_modified_at": "2026-07-31T00:30:49Z",
    "notice_id": "CN4104389-A5",
    "official_record_url": "https://www.tenders.gov.au/Cn/Show/890cb229-a5b0-43b5-9d61-1c5d06c8d1d7",
    "original_reported_value": "2077863.50",
    "procurement_method": "Limited tender",
    "source_url": "https://api.tenders.gov.au/ocds/findById/CN4104389",
    "supplier_name": "DURATEC AUSTRALIA",
    "title": "4600081270",
    "value_change": "312645303.20",
    "value_change_percentage": "15046.48",
    "versions": [
      {
        "agency_name": "Department of Defence",
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        "contract_end_date": "2029-06-30",
        "contract_id": "CN4104389",
        "contract_start_date": "2024-09-20",
        "currency": "AUD",
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        "notice_id": "CN4104389",
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        "procurement_method": "Limited tender",
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        "source_modified_at": "2024-10-29T03:28:28Z",
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        "source_url": "https://api.tenders.gov.au/ocds/findById/CN4104389",
        "supplier_name": "DURATEC AUSTRALIA",
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      {
        "agency_name": "Department of Defence",
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        "description": "Construction Services",
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        "official_record_url": "https://www.tenders.gov.au/Cn/Show/0b500e17-e255-4d3d-9212-508b7b3b91a2",
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        "source_url": "https://api.tenders.gov.au/ocds/findById/CN4104389",
        "supplier_name": "DURATEC AUSTRALIA",
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      },
      {
        "agency_name": "Department of Defence",
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        "source_release_id": "prod-40ce696568d342d5844bf9d5861eba64-aef8b63771f731fdbdd04520acece8a9",
        "source_url": "https://api.tenders.gov.au/ocds/findById/CN4104389",
        "supplier_name": "DURATEC AUSTRALIA",
        "title": "4600081270"
      },
      {
        "agency_name": "Department of Defence",
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        "official_record_url": "https://www.tenders.gov.au/Cn/Show/377abf92-1f9d-4c53-9596-0efdf81cddfe",
        "procurement_method": "Limited tender",
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        "source_url": "https://api.tenders.gov.au/ocds/findById/CN4104389",
        "supplier_name": "DURATEC AUSTRALIA",
        "title": "4600081270"
      },
      {
        "agency_name": "Department of Defence",
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        "contract_start_date": "2024-09-20",
        "currency": "AUD",
        "description": "Construction Services",
        "notice_id": "CN4104389-A4",
        "official_record_url": "https://www.tenders.gov.au/Cn/Show/b06aee7d-1fdf-4550-894b-9e49781872a2",
        "procurement_method": "Limited tender",
        "reported_value": "12454684.81",
        "source_hash": "a6293da6ad1f2a08fb44acae2fb48a6741b2a833f852ceed937f9a8c78062fe1",
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        "source_release_id": "prod-40ce696568d342d5844bf9d5861eba64-995a1b1b0c863256b9fec88b9b31658e",
        "source_url": "https://api.tenders.gov.au/ocds/findById/CN4104389",
        "supplier_name": "DURATEC AUSTRALIA",
        "title": "4600081270"
      },
      {
        "agency_name": "Department of Defence",
        "category_code": "72100000",
        "contract_end_date": "2029-06-30",
        "contract_id": "CN4104389",
        "contract_start_date": "2024-09-20",
        "currency": "AUD",
        "description": "Construction Services",
        "notice_id": "CN4104389-A5",
        "official_record_url": "https://www.tenders.gov.au/Cn/Show/890cb229-a5b0-43b5-9d61-1c5d06c8d1d7",
        "procurement_method": "Limited tender",
        "reported_value": "314723166.70",
        "source_hash": "821ae92c04b960d3588da816bf08afaa54efc7f703e5a81b61a809da6d26caaa",
        "source_modified_at": "2026-07-31T00:30:49Z",
        "source_release_id": "prod-40ce696568d342d5844bf9d5861eba64-44f31a74db2e36998f6bd9939b10dc9b",
        "source_url": "https://api.tenders.gov.au/ocds/findById/CN4104389",
        "supplier_name": "DURATEC AUSTRALIA",
        "title": "4600081270"
      }
    ]
  },
  "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"
  }
}