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Practitioners — Public Auditors · updated 2026-06-11
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Finding#2 . Misrepresented yellow-highlight meaning in MAS amendment PDFs

RLB Citation ID: RLB-F-SG-MAS-NOTICE-637-CAPITAL-ADEQUACY-BANKS-2025-Q012
AI's failure:Exposed Fabrication Risk for Public Auditors:Regulatory enforcement / professional liability exposure
What the RLB Specialist Panel found

Finding#2 . Misrepresented yellow-highlight meaning in MAS amendment PDFs

  • Citation ID: RLB-H-SG-MAS-NOTICE-637-CAPITAL-ADEQUACY-BANKS-2025-Q012-Opus47
  • AI's failure: AI confidently characterised a regulator's editorial convention in a way the regulator's own text contradicts
  • Risk for the Public Auditors: Professional liability and regulatory enforcement exposure where the published MAS text resolves the question differently For an audit team scoping testing against the 2025 amendment, an AI that characterises yellow highlighting as a reader-attention signal on live text causes the scope memorandum to capture highlighted passages as items for compliance testing. The amendment's own paragraph 3(c) states that yellow-highlighted text marks annotations that will not appear in the published untracked version. Audit scoping built on the AI's reading directs testing effort onto annotation text rather than the actual amended paragraphs, distorting the audit's coverage of the amendment's real regulatory changes and producing workpaper records that misrepresent the scope basis.
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Impact for Public Auditors in Singapore advising on the MAS Notice 637 (Amendment) 2025 - Risk Based Capital Adequacy Requirements for Banks Incorporated in Singapore

When public auditors review the amendment package for MAS Notice 637, the yellow-highlight convention determines which text actually becomes part of the consolidated Notice and is therefore in scope for the audit period. Opus 4.7's mischaracterisation, treating the annotation as visual emphasis, would distort the auditor's understanding of what changed, with downstream effects on test design and on the audit committee report. The regulator-stated annotation convention is on the face of the PDF and must be followed; auditors should default to the primary-source explanation, not the AI gloss.

References — raw findings (per AI model)
← Previous finding Finding#1 . Fabricated 'Notice FHC-N637' for financial holding companies
Cite this finding

Each finding has a stable Citation ID (RLB-F-… for aggregated case-study findings, RLB-H-… for raw per-model hallucinations) — like a DOI, the ID always resolves to the canonical finding even if URLs change.

RLB Citation ID: RLB-F-SG-MAS-NOTICE-637-CAPITAL-ADEQUACY-BANKS-2025-Q012
Plain text Download 
RegLeg Specialist Panel (2026). "Finding#2 . Misrepresented yellow-highlight meaning in MAS amendment PDFs — Practitioners — Public Auditors." Citation ID: RLB-F-SG-MAS-NOTICE-637-CAPITAL-ADEQUACY-BANKS-2025-Q012. RegLegBrief AI Hallucination Research, published 2026-06-11. https://reglegbrief.com/regulators/j3/sg/mas/notice-637-capital-adequacy-banks-2025/practitioners/public-auditors/finding/SG-MAS-SG-001-NOTICE-637-CAPITAL-ADEQUACY-BANKS-2025-v1-012/
APA 7th edition Download 
RegLeg Specialist Panel. (2026). Finding#2 . Misrepresented yellow-highlight meaning in MAS amendment PDFs [Hallucination finding RLB-F-SG-MAS-NOTICE-637-CAPITAL-ADEQUACY-BANKS-2025-Q012]. RegLegBrief AI Hallucination Research. https://reglegbrief.com/regulators/j3/sg/mas/notice-637-capital-adequacy-banks-2025/practitioners/public-auditors/finding/SG-MAS-SG-001-NOTICE-637-CAPITAL-ADEQUACY-BANKS-2025-v1-012/
Bluebook / OSCOLA (US + UK legal) Download 
RegLeg Specialist Panel, Finding#2 . Misrepresented yellow-highlight meaning in MAS amendment PDFs [RLB-F-SG-MAS-NOTICE-637-CAPITAL-ADEQUACY-BANKS-2025-Q012], RegLegBrief AI Hallucination Research (June 11, 2026), https://reglegbrief.com/regulators/j3/sg/mas/notice-637-capital-adequacy-banks-2025/practitioners/public-auditors/finding/SG-MAS-SG-001-NOTICE-637-CAPITAL-ADEQUACY-BANKS-2025-v1-012/.
BibTeX Download 
@misc{reglegbrief_RLB_F_SG_MAS_NOTICE_637_CAPITAL_ADEQUACY_BANKS_2025_Q012,
  author    = {RegLeg Specialist Panel},
  title     = {Finding#2 . Misrepresented yellow-highlight meaning in MAS amendment PDFs},
  year      = {2026},
  publisher = {RegLegBrief AI Hallucination Research},
  note      = {Hallucination finding Citation ID: RLB-F-SG-MAS-NOTICE-637-CAPITAL-ADEQUACY-BANKS-2025-Q012},
  url       = {https://reglegbrief.com/regulators/j3/sg/mas/notice-637-capital-adequacy-banks-2025/practitioners/public-auditors/finding/SG-MAS-SG-001-NOTICE-637-CAPITAL-ADEQUACY-BANKS-2025-v1-012/}
}
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