What process did the CFTC use to approve the 2024 Regulation 1.25 amendments, and were any dissenting or concurring commissioner views recorded alongside the final rule?
The model fabricated a procedural event — an open Commission meeting with a named presiding chair — with high specificity and apparent confidence. The rule was approved by seriatim vote, a non-meeting approval mechanism the CFTC uses when a matter is not scheduled for public session. This is a confabulation with institutional texture: the named date is correct, the chair's name is plausible, but the meeting itself did not happen. The specificity makes this failure particularly dangerous — a practitioner documenting the rulemaking record would treat this response as factual without independent verification.
This finding implicates confidence calibration on procedural claims where retrieval signal is thin. The model fabricated a specific open Commission meeting with a named presiding chair on a precise date — all plausible, none accurate. When web search does not surface explicit procedural-record documentation (meeting minutes, Commission vote transcript, Federal Register preamble on the approval mechanism), the model should fall back to uncertainty rather than constructing an institutional narrative from learned templates. This is a calibration gap in the generation head, not a retrieval gap.
AI assistants we tested described the December 3, 2024 adoption of the Regulation 1.25 amendments as occurring at a public open Commission meeting presided over by the Chairman — when the CFTC in fact used its seriatim voting procedure, under which commissioners sign individual voting copies without a noticed public gathering. For a Legal team at a corporate banking firm, this error travels directly into any regulatory-history section of a legal opinion, compliance-committee memo, or APA-defensibility briefing that was drafted with AI assistance.
The practical consequence is a work product that misrepresents what documentary record exists: seriatim adoption does not produce a meeting transcript, live commissioner statements, or a publicly indexed individual vote record, and a memo that implies otherwise misrepresents the evidentiary posture of any challenge to the rule. If that memo supports a board-level opinion or a written regulator response, the correction workflow — retracting and reissuing the document — carries reputational and credibility costs that are disproportionate to the apparent triviality of a single procedural sentence.
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 — CFTC seriatim adoption vs. fabricated open meeting — Corporate Banking × Legal — United States." Citation ID: RLB-F-US-CFTC-FCM-DCO-CUSTOMER-FUNDS-INVESTMENTS-REG-1-25-2024-Q005. RegLegBrief AI Hallucination Research, published 2026-06-04. https://reglegbrief.com/regulators/j3/us/cftc/fcm-dco-customer-funds-investments-reg-1-25-2024/sectors/corporate_banking/legal/finding/US-CFTC-US-001-FCM-DCO-CUSTOMER-FUNDS-INVESTMENTS-REG-1-25-2024-v1-005/
RegLeg Specialist Panel. (2026). Finding#1 — CFTC seriatim adoption vs. fabricated open meeting [Hallucination finding RLB-F-US-CFTC-FCM-DCO-CUSTOMER-FUNDS-INVESTMENTS-REG-1-25-2024-Q005]. RegLegBrief AI Hallucination Research. https://reglegbrief.com/regulators/j3/us/cftc/fcm-dco-customer-funds-investments-reg-1-25-2024/sectors/corporate_banking/legal/finding/US-CFTC-US-001-FCM-DCO-CUSTOMER-FUNDS-INVESTMENTS-REG-1-25-2024-v1-005/
RegLeg Specialist Panel, Finding#1 — CFTC seriatim adoption vs. fabricated open meeting [RLB-F-US-CFTC-FCM-DCO-CUSTOMER-FUNDS-INVESTMENTS-REG-1-25-2024-Q005], RegLegBrief AI Hallucination Research (June 04, 2026), https://reglegbrief.com/regulators/j3/us/cftc/fcm-dco-customer-funds-investments-reg-1-25-2024/sectors/corporate_banking/legal/finding/US-CFTC-US-001-FCM-DCO-CUSTOMER-FUNDS-INVESTMENTS-REG-1-25-2024-v1-005/.
@misc{reglegbrief_RLB_F_US_CFTC_FCM_DCO_CUSTOMER_FUNDS_INVESTMENTS_REG_1_25_2024_Q005,
author = {RegLeg Specialist Panel},
title = {Finding#1 — CFTC seriatim adoption vs. fabricated open meeting},
year = {2026},
publisher = {RegLegBrief AI Hallucination Research},
note = {Hallucination finding Citation ID: RLB-F-US-CFTC-FCM-DCO-CUSTOMER-FUNDS-INVESTMENTS-REG-1-25-2024-Q005},
url = {https://reglegbrief.com/regulators/j3/us/cftc/fcm-dco-customer-funds-investments-reg-1-25-2024/sectors/corporate_banking/legal/finding/US-CFTC-US-001-FCM-DCO-CUSTOMER-FUNDS-INVESTMENTS-REG-1-25-2024-v1-005/}
}