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Practitioners — Company Secretaries · Last updated 11 Jun 2026 · Hallucination Register
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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 Company Secretaries: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 Company Secretaries: Professional liability and regulatory enforcement exposure where the published MAS text resolves the question differently For a company secretarial team maintaining the compliance change log for the 2025 amendment, an AI that characterises yellow highlighting as a reader-attention signal in live text produces register entries that capture annotations as live obligations. Paragraph 3(c) of the amendment is explicit: yellow-highlighted text marks annotations describing changes, and will not appear in the published untracked version. A change log built on the AI's wrong reading captures editorial commentary as if it were a regulatory obligation, embedding the error into a record that downstream governance and audit work will reference.
  • see this finding ->
Impact for Company Secretaries in Singapore advising on the MAS Notice 637 (Amendment) 2025 - Risk Based Capital Adequacy Requirements for Banks Incorporated in Singapore

Amendment-tracking and version control of regulatory notices is a standard company-secretarial task, and the yellow-highlight question is precisely the kind of detail a secretary is expected to read correctly when summarising changes for the board. Opus 4.7's claim that the yellow markup is visual emphasis would lead the secretary to record amendment-annotation text as if it were substantive Notice content, polluting the corporate record. The MAS PDF itself states the yellow is annotation that will not appear in the untracked Notice; this is the controlling fact.

Company secretaries should establish a working rule: annotation markers on a regulator's amendment package take precedence over any AI characterisation of them.

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 — Company Secretaries." 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/company-secretaries/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/company-secretaries/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/company-secretaries/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/company-secretaries/finding/SG-MAS-SG-001-NOTICE-637-CAPITAL-ADEQUACY-BANKS-2025-v1-012/}
}
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