Corporate Banking × Compliance — Singapore · Last updated 28 May 2026 · methodology v2.1 · Hallucination Register

Content and scope of Annex 4D in the consolidated MAS Notice 637

What the RLB Specialist Panel found

3. Content and scope of Annex 4D in the 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 (consolidated) (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. The AI's own response includes a caveat acknowledging that search results pointed toward the standardised approach credit risk framework instead — meaning the AI simultaneously asserts one characterisation and flags a conflicting one without resolving the discrepancy.
What the regulator actually says: The numbering convention of the Notice — where a "4" prefix indicates an annex to Part IV — strongly suggests that Annex 4D relates to the standardised approach credit risk framework rather than the leverage ratio framework. The precise scope and explicit exclusions within that annex must be confirmed from the text of the consolidated Notice directly.
Why the AI went wrong: The AI could not retrieve the verified text of Annex 4D and instead inferred its content from a general understanding of capital adequacy frameworks. When its own search results contradicted its primary characterisation, it noted the conflict but still led with the likely-incorrect framing. A Compliance team reading the response would have to decide which characterisation to trust — and the AI provided no basis for making that judgment.
Cited source(s):

Impact for Compliance Teams in Corporate Banking Sector in Singapore working with the AI Hallucinations Affecting Compliance at Corporate Banking Firms in Singapore

If a Compliance team incorporates the AI's unverified characterisation of Annex 4D — as covering credit conversion factors for the leverage ratio framework — into internal credit risk or leverage reporting policies, the firm may apply the wrong analytical framework to a category of off-balance sheet items. This type of structural error in a capital reporting policy can persist across multiple reporting cycles before it is detected, particularly if the policy is not subject to annual primary-source verification.

Regulatory reporting errors of this kind can trigger MAS supervisory review, requirements to restate submitted returns, and — depending on the materiality of the affected positions — financial penalties or capital add-ons imposed by MAS under its supervisory powers.

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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 Download

RegLeg Specialist Panel (2026). "Content and scope of Annex 4D in the consolidated MAS Notice 637 — Corporate Banking × Compliance — Singapore." Citation ID: . RegLegBrief AI Hallucination Research, published 2026-05-28. https://reglegbrief.com/audiences/sectors/sg/corporate_banking/compliance/finding/q-NOTICE-637-CAPITAL-ADEQUACY-BANKS-2025-v1-017/

APA 7th edition Download

RegLeg Specialist Panel. (2026). Content and scope of Annex 4D in the consolidated MAS Notice 637 [Hallucination finding ]. RegLegBrief AI Hallucination Research. https://reglegbrief.com/audiences/sectors/sg/corporate_banking/compliance/finding/q-NOTICE-637-CAPITAL-ADEQUACY-BANKS-2025-v1-017/

Bluebook / OSCOLA (US + UK legal) Download

RegLeg Specialist Panel, Content and scope of Annex 4D in the consolidated MAS Notice 637 [], RegLegBrief AI Hallucination Research (May 28, 2026), https://reglegbrief.com/audiences/sectors/sg/corporate_banking/compliance/finding/q-NOTICE-637-CAPITAL-ADEQUACY-BANKS-2025-v1-017/.

BibTeX Download

@misc{reglegbrief_,
  author    = {RegLeg Specialist Panel},
  title     = {Content and scope of Annex 4D in the consolidated MAS Notice 637},
  year      = {2026},
  publisher = {RegLegBrief AI Hallucination Research},
  note      = {Hallucination finding Citation ID: },
  url       = {https://reglegbrief.com/audiences/sectors/sg/corporate_banking/compliance/finding/q-NOTICE-637-CAPITAL-ADEQUACY-BANKS-2025-v1-017/}
}

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Every finding on this page compares an AI subject's account of the rule against the regulator's verbatim text from the regulator's own portal. Both are linked. Each delta, its root causes, and impact analysis are documented and published with immutable Citation IDs.