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Practitioners — Lawyers · published 2026-05-28 · methodology v2.1

Scope and exclusions of Annex 4D in consolidated MAS Notice 637

What the RLB Specialist Panel found

3. Scope and exclusions of Annex 4D in consolidated MAS Notice 637

  • Question (paraphrased to protect IP): What does Annex 4D of the consolidated MAS Notice 637 cover, and what category of items does it explicitly exclude from its scope?
  • Source regulation: MAS Notice 637 — Risk Based Capital Adequacy Requirements for Banks Incorporated in Singapore (Regulator portal: https://www.mas.gov.sg)
  • What AI assistants typically say: AI tools characterise Annex 4D as setting out credit conversion factors for off-balance sheet items in the context of the leverage ratio framework, while simultaneously flagging in a caveat that search results pointed toward the standardised approach credit risk framework instead — presenting both characterisations without resolving the contradiction.
  • What the regulator actually says: No regulator excerpt was available for this finding. Practitioners should consult the consolidated MAS Notice 637 directly to confirm the subject matter of Annex 4D.
  • Why the AI went wrong: The AI's own hedging language reveals the failure: it could not retrieve the actual content of Annex 4D and offered a primary characterisation it acknowledged might be wrong. The numbering convention — Annex 4D falling under Part IV — points strongly toward the standardised approach credit risk framework rather than the leverage ratio, making the AI's lead characterisation likely incorrect. Presenting both possibilities as if they are equivalent options understates the degree of uncertainty.
  • Cited source(s):
Impact for this audience

A Lawyer scoping a client's obligations under MAS Notice 637 who relies on the AI's mischaracterisation of Annex 4D may advise the client that certain off-balance sheet exposures fall under the leverage ratio framework when they may in fact be governed by the standardised approach credit risk rules — or vice versa. The practical consequence is incorrect capital calculation methodology applied to those exposures, with potential downstream effects on reported capital ratios and MAS regulatory returns. The AI's own self-contradictory answer compounds the risk because it creates the appearance of transparency while still leading the practitioner toward a potentially wrong primary answer.

References — raw findings (per AI model)
This finding also affects
← Previous finding Finding 2. Meaning of yellow highlighting in MAS Notice 637 amendment PDFs Next finding → Finding 4. Subject matter of Annex 6C in consolidated MAS Notice 637
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 and exclusions of Annex 4D in consolidated MAS Notice 637 — Practitioners — Lawyers." Citation ID: . RegLegBrief AI Hallucination Research, published 2026-05-28. https://reglegbrief.com/audiences/practitioners/sg/lawyers/finding/q-NOTICE-637-CAPITAL-ADEQUACY-BANKS-2025-v1-017/
APA 7th edition
RegLeg Specialist Panel. (2026). Scope and exclusions of Annex 4D in consolidated MAS Notice 637 [Hallucination finding ]. RegLegBrief AI Hallucination Research. https://reglegbrief.com/audiences/practitioners/sg/lawyers/finding/q-NOTICE-637-CAPITAL-ADEQUACY-BANKS-2025-v1-017/
Bluebook / OSCOLA (US + UK legal)
RegLeg Specialist Panel, Scope and exclusions of Annex 4D in consolidated MAS Notice 637 [], RegLegBrief AI Hallucination Research (May 28, 2026), https://reglegbrief.com/audiences/practitioners/sg/lawyers/finding/q-NOTICE-637-CAPITAL-ADEQUACY-BANKS-2025-v1-017/.
BibTeX
@misc{reglegbrief_,
  author    = {RegLeg Specialist Panel},
  title     = {Scope and exclusions of Annex 4D in consolidated MAS Notice 637},
  year      = {2026},
  publisher = {RegLegBrief AI Hallucination Research},
  note      = {Hallucination finding Citation ID: },
  url       = {https://reglegbrief.com/audiences/practitioners/sg/lawyers/finding/q-NOTICE-637-CAPITAL-ADEQUACY-BANKS-2025-v1-017/}
}
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