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Practitioners — Accountants (CA/PA) · published 2026-05-28 · methodology v2.1

Scope of MAS Notice 637 and the separate FHC notice designation

What the RLB Specialist Panel found

1. Scope of MAS Notice 637 and the separate FHC notice designation

  • Question (paraphrased to protect IP): Does MAS Notice 637 on risk-based capital adequacy apply to financial holding companies incorporated in Singapore, or is there a separate MAS notice for them, and if so, what is it?
  • Source regulation: MAS Notice 637 — Risk-Based Capital Adequacy Requirements for Banks (Regulator portal: https://www.mas.gov.sg)
  • What AI assistants typically say: The AI correctly identified that a separate notice applies to financial holding companies rather than MAS Notice 637, but then provided a specific notice designation — "Notice FHC-N637" — to identify that instrument.
  • What the regulator actually says: No regulator excerpt was available for direct quotation; practitioners should consult the MAS portal at https://www.mas.gov.sg for the current instrument applicable to financial holding companies.
  • Why the AI went wrong: The AI appears to have constructed the notice designation "FHC-N637" by analogy — combining the Financial Holding Companies Act prefix with the bank notice number — rather than retrieving a verified instrument name. The correct designation cannot be confirmed from this fabricated label alone, and a practitioner acting on it risks citing a non-existent regulatory instrument.
  • Cited source(s):
Impact for this audience

An Accountants (CA/PA) advising a client on whether a Singapore-incorporated financial holding company falls within MAS Notice 637 could, on the basis of the AI's fabricated notice designation, draft correspondence or a compliance memo citing 'Notice FHC-N637' — an instrument that cannot be verified in the MAS register. If that reference is transmitted to a client, to MAS, or included in a regulatory filing, the practitioner faces professional liability for providing incorrect regulatory guidance. The client, if it structures its capital adequacy compliance around a misidentified instrument, risks a supervisory gap that MAS could treat as a breach of its obligations under the Financial Holding Companies Act.

References — raw findings (per AI model)
This finding also affects
Next finding → Finding 2. Meaning of yellow highlighting in the MAS Notice 637 (Amendment) 2024
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.

Plain text 
RegLeg Specialist Panel (2026). "Scope of MAS Notice 637 and the separate FHC notice designation — Practitioners — Accountants (CA/PA)." Citation ID: . RegLegBrief AI Hallucination Research, published 2026-05-28. https://reglegbrief.com/audiences/practitioners/sg/accountants-ca-pa/finding/q-NOTICE-637-CAPITAL-ADEQUACY-BANKS-2025-v1-010/
APA 7th edition 
RegLeg Specialist Panel. (2026). Scope of MAS Notice 637 and the separate FHC notice designation [Hallucination finding ]. RegLegBrief AI Hallucination Research. https://reglegbrief.com/audiences/practitioners/sg/accountants-ca-pa/finding/q-NOTICE-637-CAPITAL-ADEQUACY-BANKS-2025-v1-010/
Bluebook / OSCOLA (US + UK legal) 
RegLeg Specialist Panel, Scope of MAS Notice 637 and the separate FHC notice designation [], RegLegBrief AI Hallucination Research (May 28, 2026), https://reglegbrief.com/audiences/practitioners/sg/accountants-ca-pa/finding/q-NOTICE-637-CAPITAL-ADEQUACY-BANKS-2025-v1-010/.
BibTeX 
@misc{reglegbrief_,
  author    = {RegLeg Specialist Panel},
  title     = {Scope of MAS Notice 637 and the separate FHC notice designation},
  year      = {2026},
  publisher = {RegLegBrief AI Hallucination Research},
  note      = {Hallucination finding Citation ID: },
  url       = {https://reglegbrief.com/audiences/practitioners/sg/accountants-ca-pa/finding/q-NOTICE-637-CAPITAL-ADEQUACY-BANKS-2025-v1-010/}
}
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