A risk operations team asked an AI to produce a one-page operational guidance note on CFTC Regulation 1.44 margin call timing, specifying which currencies require same-day collection, which receive an extension, and the precise deadlines for configuring system parameters. The AI described a two-tier structure — USD on a same-day Fedwire close deadline and all other fiat currencies (including CAD, EUR, GBP, JPY, HKD, and AUD) under a single banking-holiday extension rule.
The final rule implements a three-tier structure: USD and CAD share the same-day Fedwire close deadline; ten Appendix A currencies (AUD, CNY, HKD, HUF, ILS, JPY, NZD, SGD, ZAR, and TRY) receive a second-business-day deadline by 12:00 p.m. ET; all remaining fiat currencies receive a first-business-day deadline. An FCM treasury team that relied on the AI's two-tier guidance would have misconfigured deadlines for CAD (permitting a one-day slip the rule doesn't allow) and applied incorrect base deadlines to the ten Appendix A currencies. When re-probed, the AI self-retracted.
The model collapsed a three-tier, Appendix A membership-defined deadline structure into a two-tier schema — USD same-day versus everything else on a holiday-extension rule. CAD, which shares the USD same-day Fedwire tier in the final rule, was placed in the non-USD extension group. The ten Appendix A currencies, which have a distinct second-business-day deadline, received the same treatment as unlisted fiat currencies.
The model's self-retraction on re-probe indicates the correct structure was reachable but was not the initial generation path — suggesting the two-tier output reflects a prior on how currency margin rules are typically structured, overriding the regulation's specific Appendix A enumeration. The cited third-party source (Fabricated) was not the regulation's primary text.
The model's two-tier reconstruction and the Fabricated third-party citation together implicate the retrieval-ranking layer: when web search returns third-party law-firm summary content that uses a simpler two-tier schema, that content appears to be weighted comparably to primary regulatory text. The self-retraction on re-probe confirms the correct three-tier structure was accessible — the generation pathway selected the wrong output despite having the right information available. This is a calibration failure in the RAG-to-generation handoff: retrieved primary text was not given sufficient authority to override the model's prior or the third-party summary's framing.
An Operations team that routes the AI's two-tier guidance note into its treasury system configuration process would misconfigure margin call deadlines for every CAD-denominated position — permitting a one-day slip the rule does not allow — and set incorrect base deadlines for all ten Appendix A currencies including AUD, JPY, and HKD. For a US investment bank with material multi-currency cleared derivatives flow, this is a systemic control gap that would surface in a CFTC examination of the firm's margin collection practices.
Remediation would require a full audit of configured deadlines, retroactive assessment of any margin calls collected on wrong timelines, and potential notification to affected customers — with CFTC enforcement exposure under the separate account framework if the misconfiguration resulted in under-collection.
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.
RegLeg Specialist Panel (2026). "Finding#1 — Three-tier currency deadline collapsed to two tiers — Investment Banking × Operations — United States." Citation ID: RLB-F-US-CFTC-FCM-MARGIN-ADEQUACY-SEPARATE-ACCOUNTS-REG-1-44-Q001. RegLegBrief AI Hallucination Research, published 2026-06-06. https://reglegbrief.com/regulators/j3/us/cftc/fcm-margin-adequacy-separate-accounts-reg-1-44/sectors/investment_banking/operations/finding/US-CFTC-US-001-FCM-MARGIN-ADEQUACY-SEPARATE-ACCOUNTS-REG-1-44-v1-001/
RegLeg Specialist Panel. (2026). Finding#1 — Three-tier currency deadline collapsed to two tiers [Hallucination finding RLB-F-US-CFTC-FCM-MARGIN-ADEQUACY-SEPARATE-ACCOUNTS-REG-1-44-Q001]. RegLegBrief AI Hallucination Research. https://reglegbrief.com/regulators/j3/us/cftc/fcm-margin-adequacy-separate-accounts-reg-1-44/sectors/investment_banking/operations/finding/US-CFTC-US-001-FCM-MARGIN-ADEQUACY-SEPARATE-ACCOUNTS-REG-1-44-v1-001/
RegLeg Specialist Panel, Finding#1 — Three-tier currency deadline collapsed to two tiers [RLB-F-US-CFTC-FCM-MARGIN-ADEQUACY-SEPARATE-ACCOUNTS-REG-1-44-Q001], RegLegBrief AI Hallucination Research (June 06, 2026), https://reglegbrief.com/regulators/j3/us/cftc/fcm-margin-adequacy-separate-accounts-reg-1-44/sectors/investment_banking/operations/finding/US-CFTC-US-001-FCM-MARGIN-ADEQUACY-SEPARATE-ACCOUNTS-REG-1-44-v1-001/.
@misc{reglegbrief_RLB_F_US_CFTC_FCM_MARGIN_ADEQUACY_SEPARATE_ACCOUNTS_REG_1_44_Q001,
author = {RegLeg Specialist Panel},
title = {Finding#1 — Three-tier currency deadline collapsed to two tiers},
year = {2026},
publisher = {RegLegBrief AI Hallucination Research},
note = {Hallucination finding Citation ID: RLB-F-US-CFTC-FCM-MARGIN-ADEQUACY-SEPARATE-ACCOUNTS-REG-1-44-Q001},
url = {https://reglegbrief.com/regulators/j3/us/cftc/fcm-margin-adequacy-separate-accounts-reg-1-44/sectors/investment_banking/operations/finding/US-CFTC-US-001-FCM-MARGIN-ADEQUACY-SEPARATE-ACCOUNTS-REG-1-44-v1-001/}
}
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.