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Law Firms × Legal — International / Multilateral · Last updated 11 Jun 2026 · Hallucination Register
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Finding#3, Two-tier reporting cycle collapsed to uniform five-year interval

RLB Citation ID: RLB-F-INT-OECD-OECD-MERGER-REVIEW-RECOMMENDATION-2025-Q004
AI's failure:Exposed Fabrication Risk for Law Firms × Legal:Wrong deliverable
What the RLB Specialist Panel found
Question (paraphrased to protect IP)

What does Section VIII.c of the 2025 OECD Merger Review Recommendation require of the Competition Committee regarding Council reporting, including the specific timeline and whether the reporting structure involves a single uniform interval or multiple distinct intervals?

RLB's analysis

Section VIII.c establishes a two-stage interval structure: an initial report within five years of the 2025 revision, then reports at minimum every ten years thereafter. The model collapsed this into a uniform five-year cycle, applying the initial, tighter interval as the recurring interval, and then arithmetically projected specific report years (2030, 2035) that appear nowhere in the text. The error erases a meaningful structural distinction: the first interval is an expedited post-revision check; the recurring interval is a longer-cadence review.

The model produced a response with the format of a precise, text-grounded answer while substituting a simpler reconstruction for the actual two-interval structure.

AI Head's analysis — what weakness in the AI model caused this

The collapse of a two-stage interval into a uniform five-year cycle, combined with arithmetic projection of specific years not in the text, is a numeric-precision failure: the model applied the initial interval as the recurring interval and extended it without flagging that the text specifies a different cadence for subsequent reports. The training-data representation of Section VIII.c's two-interval structure appears absent or insufficient, causing the model to reconstruct from the simpler single-interval convention. The self-generated year projections compound the error by adding specificity that has no textual basis.

Impact for Legal Teams in Law Firms Sector in international jurisdictions working with the Recommendation of the Council on Merger Review (2025 Revision)

AI stated that Section VIII.c requires the Competition Committee to report every five years on a uniform recurring cycle, projecting 2030 and 2035 as the first two report dates. The actual provision establishes a two-tier structure: an initial report within five years (by 2030), then reports at least every ten years thereafter, meaning the second report falls due by 2040, not 2035.

Any regulatory implementation timeline, compliance calendar, or policy-watch memorandum built on the AI's characterisation will misstate when the next review of the Recommendation's continued relevance is expected. For a client tracking the likelihood of further revision to their operating jurisdictions' merger control regimes, this is a materially wrong deliverable, a wrong-deliverable failure that would not survive comparison against the primary text but that could travel undetected through an AI-assisted drafting process.

References — raw findings (per AI model)
This finding also affects
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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.

RLB Citation ID: RLB-F-INT-OECD-OECD-MERGER-REVIEW-RECOMMENDATION-2025-Q004
Plain text Download
RegLeg Specialist Panel (2026). "Finding#3, Two-tier reporting cycle collapsed to uniform five-year interval — Law Firms × Legal — International / Multilateral." Citation ID: RLB-F-INT-OECD-OECD-MERGER-REVIEW-RECOMMENDATION-2025-Q004. RegLegBrief AI Hallucination Research, published 2026-06-11. https://reglegbrief.com/regulators/j1/int/OECD/OECD-MERGER-REVIEW-RECOMMENDATION-2025/sectors/law_firms/legal/finding/INT-OECD-INT-001-OECD-MERGER-REVIEW-RECOMMENDATION-2025-v1-004/
APA 7th edition Download
RegLeg Specialist Panel. (2026). Finding#3, Two-tier reporting cycle collapsed to uniform five-year interval [Hallucination finding RLB-F-INT-OECD-OECD-MERGER-REVIEW-RECOMMENDATION-2025-Q004]. RegLegBrief AI Hallucination Research. https://reglegbrief.com/regulators/j1/int/OECD/OECD-MERGER-REVIEW-RECOMMENDATION-2025/sectors/law_firms/legal/finding/INT-OECD-INT-001-OECD-MERGER-REVIEW-RECOMMENDATION-2025-v1-004/
Bluebook / OSCOLA (US + UK legal) Download
RegLeg Specialist Panel, Finding#3, Two-tier reporting cycle collapsed to uniform five-year interval [RLB-F-INT-OECD-OECD-MERGER-REVIEW-RECOMMENDATION-2025-Q004], RegLegBrief AI Hallucination Research (June 11, 2026), https://reglegbrief.com/regulators/j1/int/OECD/OECD-MERGER-REVIEW-RECOMMENDATION-2025/sectors/law_firms/legal/finding/INT-OECD-INT-001-OECD-MERGER-REVIEW-RECOMMENDATION-2025-v1-004/.
BibTeX Download
@misc{reglegbrief_RLB_F_INT_OECD_OECD_MERGER_REVIEW_RECOMMENDATION_2025_Q004,
  author    = {RegLeg Specialist Panel},
  title     = {Finding#3, Two-tier reporting cycle collapsed to uniform five-year interval},
  year      = {2026},
  publisher = {RegLegBrief AI Hallucination Research},
  note      = {Hallucination finding Citation ID: RLB-F-INT-OECD-OECD-MERGER-REVIEW-RECOMMENDATION-2025-Q004},
  url       = {https://reglegbrief.com/regulators/j1/int/OECD/OECD-MERGER-REVIEW-RECOMMENDATION-2025/sectors/law_firms/legal/finding/INT-OECD-INT-001-OECD-MERGER-REVIEW-RECOMMENDATION-2025-v1-004/}
}
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