{
  "schema": "varexis-public-evidence-record/0.3",
  "generated_at_utc": "2026-10-16T13:36:43.315Z",
  "record_id": "VXI-EXT-PROCUREMENT-S3-BLOCK-PERSISTENCE-01-v1",
  "record_kind": "external_reference",
  "title": "S3 public-access blocks: Retained grants and scope",
  "system": "Amazon S3",
  "evidence_family": "vendor_evidence_review",
  "index_status": "PUBLIC_SAFE_SOURCE_REVIEW",
  "evidence_state": "PRIMARY_DOCUMENTATION_REVIEW_ONLY",
  "canonical_question": "Does enabling S3 Block Public Access remove the old public grants?",
  "near_questions": [
    "Are existing public ACLs deleted by the setting?",
    "Does IgnorePublicAcls prevent new ACLs from being stored?",
    "Does BlockPublicAcls reject new public grants?",
    "Do bucket and account settings combine?",
    "Can organization settings be stricter?",
    "What happens if a blocking setting is removed?",
    "Are retained bucket policies still present?",
    "Does public-access blocking prove least privilege?",
    "Which access point is used?",
    "Has actual access been checked?",
    "What evidence supports grant cleanup?",
    "Can I save the retained-grant boundary?"
  ],
  "supported_claims": [
    {
      "claim": "The settings can reject new public grants or ignore their effects without rewriting existing ACLs and policies. Their behaviours differ, and the most restrictive applicable combination governs access. A blocking setting is not evidence that underlying grants were cleaned up or that every non-public access path is appropriate.",
      "reliance": "DOCUMENTED_CAPABILITY_ONLY"
    }
  ],
  "not_demonstrated_claims": [
    "Verified buyer configuration or effective access rights",
    "Independent execution, completeness or security testing",
    "Vendor certification, legal compliance or guaranteed suitability"
  ],
  "public_summary": "The settings can reject new public grants or ignore their effects without rewriting existing ACLs and policies. Their behaviours differ, and the most restrictive applicable combination governs access. A blocking setting is not evidence that underlying grants were cleaned up or that every non-public access path is appropriate.",
  "related_record_ids": [],
  "source_review": {
    "source_type": "official_external_documentation",
    "source_title": "S3 Block Public Access",
    "source_url": "https://docs.aws.amazon.com/AmazonS3/latest/userguide/access-control-block-public-access.html",
    "checked_on": "2026-10-16",
    "candidate_record_id": "VXI-EXT-PROCUREMENT-S3-BLOCK-PERSISTENCE-01-v1",
    "candidate_record_sha256": "c480975c777c2e15aa2bb4cd944d4dd2b84d8424104fecb08ec14b9d1d0eabcb",
    "method": "Primary documentation reviewed for the published bounded statement.",
    "deployment_tested_by_varexis": false,
    "revalidation": "The delivered snapshot preserves the review date shown. Recheck current primary documentation and deployment context before relying on present applicability; payment does not trigger fresh research."
  },
  "answer_policy": {
    "classification": "DOCUMENTED_WITH_DEPLOYMENT_BOUNDARY",
    "bounded_answer": "The settings can reject new public grants or ignore their effects without rewriting existing ACLs and policies. Their behaviours differ, and the most restrictive applicable combination governs access. A blocking setting is not evidence that underlying grants were cleaned up or that every non-public access path is appropriate.",
    "required_buyer_context": "Organization, account, bucket and access-point settings, ACLs and policies. Effective configuration and dated operational evidence have not been inspected.",
    "missing_evidence": "A broader claim needs evidence matching the intended use. Payment does not upgrade the evidence state."
  },
  "private_boundary": "Raw logs, thresholds, private paths, source code, protected mechanisms and reconstruction-level details are excluded from public and paid delivery.",
  "decision_profile": {
    "schema": "varexis-vendor-evidence-review/1",
    "review_status": "documentation_review_only",
    "checked_on": "2026-10-16",
    "claim_to_check": "A public-access block deletes the underlying public grants and proves least privilege.",
    "documented_statement": {
      "status": "documented",
      "statement": "The settings can reject new public grants or ignore their effects without rewriting existing ACLs and policies. Their behaviours differ, and the most restrictive applicable combination governs access. A blocking setting is not evidence that underlying grants were cleaned up or that every non-public access path is appropriate.",
      "source_ids": [
        "s3public"
      ]
    },
    "buyer_evidence_required": [
      "All applicable block settings and policy levels.",
      "Retained bucket policies and ACLs.",
      "Authorized access paths and change history."
    ],
    "review_condition": {
      "status": "varexis_review_policy",
      "statement": "Inspect retained grants and effective settings before relying on later removal of a block."
    },
    "unknowns": "The buyer configuration, contract, effective entitlement and operational evidence have not been inspected. Missing evidence does not establish absence or failure of the feature.",
    "evidence_sources": [
      {
        "source_id": "s3public",
        "url": "https://docs.aws.amazon.com/AmazonS3/latest/userguide/access-control-block-public-access.html",
        "final_url": "https://docs.aws.amazon.com/AmazonS3/latest/userguide/access-control-block-public-access.html",
        "title": "S3 Block Public Access",
        "checked_on": "2026-10-16",
        "sha256": "a24e4b0120c94454ddd1ae9a665bf8bf1dde22ec286706a5f2991fa6080076d1",
        "bytes": 46261
      }
    ],
    "observed_deployment": false,
    "commercial_reliance_boundary": "Procurement evidence support only; no supplier clearance, legal conclusion, configuration audit or verification of the buyer's claim is supplied.",
    "paid_value": {
      "decision_context": "Save the difference between disabling a grant effect and removing the grant.",
      "free": "Complete review, practical questions, sources and limitations; may be saved locally.",
      "single_request": "Existing server-saved version-bound route snapshot for later authenticated retrieval.",
      "evidence_receipt": "The same snapshot plus the existing unsigned delivery receipt.",
      "excluded": [
        "Fresh vendor research",
        "Continuous monitoring or change alerts",
        "Testing the buyer configuration",
        "Private evidence or vendor certification"
      ],
      "integrity": "Hashes identify content versions; they do not prove truth or provide a signature."
    },
    "revalidation": {
      "trigger": "A saved purchase does not recheck the source or buyer configuration.",
      "specific_watch": "Organization, account, bucket and access-point settings, ACLs and policies."
    }
  },
  "paid_access_note": "The full published answer and boundaries are free. Paid access saves the selected route and source versions, with an unsigned receipt when purchased. Preview coverage before paying. Fresh research, bespoke assessment and protected evidence are excluded.",
  "service_route": {
    "request_guide": "/varexis-index/request.html",
    "request_workflow": "/varexis-index/request-workflow.json",
    "service_id": "single_request",
    "service_routes_url": "/varexis-index/service-routes.json",
    "payment_required": true,
    "availability_endpoint": "/api/index/capabilities",
    "operational_status": "AUTOMATIC_SERVICE_CAPABILITIES_GATED",
    "checkout_url": "/index-access"
  },
  "authority_boundary": "VAREXIS-INDEX informs evidence reliance. It does not provide advice, certification, deployment authority, security assurance, production approval, or guarantee.",
  "human_page": "/varexis-index/catalog.html#s3-block-public-access-retained-policy-boundary",
  "machine_readable_record": "/varexis-index/records/s3-block-public-access-retained-policy-boundary.json"
}