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Practitioners — Lawyers · Last updated 11 Jun 2026 · methodology v2.3 · Hallucination Register
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AI Hallucination on BBNJ High Seas Biodiversity Agreement for Lawyers in international jurisdictions

Lawyers: AI summaries of BBNJ Agreement may understate professional obligations

Lawyers advising on the BBNJ Agreement are increasingly using AI to draft 2-page client memos on benefit-sharing exposure, generate partner-level briefings on environmental impact assessment thresholds for high-seas activities, and validate treaty-citation language against the deposited Agreement text before issuing legal opinions.

The RLB Specialist Panel put a set of practitioner-grade questions on the BBNJ Agreement to two frontier AI models with web search active. Each question is prepared by the Panel based on the workflows that lawyers actually use AI for under this treaty, covering the screening threshold for environmental impact assessments under Part IV, the temporal scope of the marine genetic resources and digital sequence information regime under Part II, the benefit-sharing duty for digital sequence information, and the non-undermining duty constraining Conference of the Parties decisions on area-based management tools under Part III.

The Panel then binds every AI response to verbatim regulator-issued source text held as primary substrate, comparing the AI output line-by-line against the deposited treaty text. Only responses where the AI subject was demonstrably wrong against the verbatim regulator-issued source text are published; responses that were substantively correct, or that refused on calibration grounds, are retained internally and not surfaced. On the BBNJ Agreement, the AI subjects returned four hallucinated answers in the form of Inverted-Position Hallucination together with Source-Credit Misattribution for lawyers.

For lawyers issuing legal opinions, memoranda, and transactional documents that engage the BBNJ Agreement, treaty-citation accuracy is load-bearing: a counterparty, opposing counsel, or regulatory reviewer who can identify a citation error on first reading of the document calls the entire piece of advice into question.

An AI-drafted memo that points at the wrong article on a screening threshold, mis-states the direction of a benefit-sharing rule, or mis-locates the constraint on Conference of the Parties authority leaves the lawyer exposed to professional liability, the firm exposed to reputational risk, and the client exposed to commercial loss from a position structured on the wrong rule.

The published Specialist Panel findings, with model attribution, carry the following citation identifiers, each hyperlinked to the bound regulator-issued source text on the BBNJ Agreement regulation hub. The audit register surfaces these findings for lawyers so that any AI-assisted treaty citation, paraphrase, or rule-statement entering a deliverable can be re-validated against the deposited treaty text before the document is issued:

Take me back to my Lawyers (INT) overview

Executive Summary

The BBNJ Agreement, formally the United Nations Treaty on Marine Biodiversity of Areas Beyond National Jurisdiction, introduces a binding international framework governing environmental impact assessments, access to marine genetic resources, benefit-sharing over digital sequence information, and area-based management tools in the high seas. For Lawyers practising across international jurisdictions, this treaty creates novel obligations that intersect marine science, intellectual property, environmental law, and the existing architecture of UNCLOS. Across 4 questions put to AI tools on this regulation that bear on a lawyer's day-to-day work, every one produced a materially incorrect answer.

The errors include a direct inversion of the treaty's retroactivity default, misattribution of the article that sets the EIA screening threshold, a wrong article reference for the DSI benefit-sharing obligation, and a misattribution of the provision governing the Conference of the Parties' authority over area-based management. In each case, the AI tool answered with confidence and only acknowledged uncertainty when pressed, a pattern that substantially increases reliance risk for any practitioner who does not independently verify every treaty article cited.

How AI gets this regulation wrong

The dominant pattern across AI responses on this treaty is article-level misattribution paired with substantive paraphrases that are broadly correct: AI tools stated specific article numbers and operative thresholds with precision, retracted or qualified those statements when challenged, and in the retroactivity question generated a default rule that is the opposite of what Article 10(1) actually provides. Together, these failure modes make AI assistance on the BBNJ Agreement particularly hazardous for practitioners who need article-level accuracy to advise clients or draft instruments.

AI's Failure ModeCountAffected findings
Misattributed3Finding#1 · Finding#3 · Finding#4
Misstated Rule1Finding#2

What that means for your practice

Every confirmed error on this regulation carries professional indemnity and liability exposure for Lawyers. Because the BBNJ Agreement governs high-stakes commercial and scientific activities such as research expeditions, bioprospecting ventures, shipping route planning, and treaty compliance programmes, incorrect legal advice flowing from AI-generated errors could expose practitioners to negligence claims and expose their clients to regulatory breach. The risk is not theoretical: the errors documented here would each, if taken at face value, produce a fundamentally wrong legal position on treaty obligations that States, international organisations, and private parties are actively beginning to litigate and transact around.

Risk ImpactCountAffected findings
Liability / PI exposure4Finding#1 · Finding#2 · Finding#3 · Finding#4

When this affects Lawyers

Lawyers in international jurisdictions encounter the BBNJ Agreement most frequently when advising clients who conduct or finance marine scientific research in areas beyond national jurisdiction, including academic institutions, biotechnology companies, environmental NGOs, and flag States. Practical questions arise quickly. Does a proposed deep-sea survey require an environmental impact assessment? Which benefit-sharing obligations apply to data derived from biological samples already collected? Does a planned shipping route through a prospective marine protected area remain unaffected by Conference of the Parties decisions? These are precisely the questions practitioners reach for AI to scope before committing time to primary-source research.

The risk of AI error in this context is amplified by the treaty's novelty. The BBNJ Agreement only opened for signature in 2023, entered into force on 17 January 2026, and has not yet accumulated the body of secondary literature, judicial interpretation, and professional commentary that practitioners use to triangulate uncertain AI responses. A lawyer who receives a confident AI answer has fewer cross-checks available than for a mature instrument, and the AI's apparent confidence is more likely to go unchallenged.

An incorrect EIA threshold or a misidentified article number embedded in a legal opinion or a transactional disclosure document could constitute a material professional error.

The stakes extend beyond individual client advice. Practitioners advising States on treaty implementation, companies on regulatory compliance programmes, or research institutions on data-governance policies may reproduce AI-generated errors at scale, building internal policies, training materials, or contract templates on a fundamentally wrong understanding of the treaty's operative provisions.

The findings at a glance

The table below summarises each confirmed error documented in our research on this regulation for Lawyers in international jurisdictions, with the failure type and the citation identifier for each.

#Finding titleTypeCitation ID
1EIA screening threshold misattributed to wrong articleHallucinationRLB-F-INT-UNTC-BBNJ-HIGH-SEAS-BIODIVERSITY-AGREEMENT-2023-Q001
2MGR retroactivity default invertedHallucinationRLB-F-INT-UNTC-BBNJ-HIGH-SEAS-BIODIVERSITY-AGREEMENT-2023-Q003
3DSI benefit-sharing article misidentifiedHallucinationRLB-F-INT-UNTC-BBNJ-HIGH-SEAS-BIODIVERSITY-AGREEMENT-2023-Q004
4Non-undermining clause attributed to wrong articleHallucinationRLB-F-INT-UNTC-BBNJ-HIGH-SEAS-BIODIVERSITY-AGREEMENT-2023-Q005

Aggregate impact

The errors across these findings are not random. They cluster on the treaty's most commercially and legally consequential provisions: the EIA trigger, the MGR retroactivity default, the DSI benefit-sharing article, and the Conference of the Parties' area-based management authority. All involve article-level misattributions or substantive rule inversions. What this reveals is a systematic pattern in which AI tools have absorbed enough about the BBNJ Agreement to generate plausible-sounding answers, but not enough to get the operative text right at the level of precision that legal practice requires.

The retroactivity inversion is the most dangerous error in the set. The BBNJ Agreement is explicitly non-retroactive by default. Marine genetic resource and digital sequence information provisions apply only to resources collected after entry into force for each Party. AI tools tested on this point stated the opposite, that the regime is retroactive by default, with an opt-out available. If a lawyer advising a bioprospecting company or a research institution takes that answer at face value, the client's legal position on access agreements and benefit-sharing obligations for existing sample collections would be entirely wrong.

Multiple AI tools produced this error independently, suggesting the failure is not idiosyncratic to a single model's training data.

The EIA threshold error compounds this picture: an AI tool placed the screening provision at Article 30 rather than Article 27 (Part IV). The substantive qualitative test (more than a minor or transitory effect) the model paraphrased is the Article 27 language, so the substance was right while the citation was wrong, leaving any legal opinion that pins the trigger to Article 30 defective on first review.

What your team should do

The default position for Lawyers advising on the BBNJ Agreement should be: treat AI-generated article citations as unverified until confirmed against the treaty text. The errors documented here are not matters of interpretation. They involve the wrong article number, the wrong operative standard, and the inverted operative default. None of these would be exposed by a plausibility check; they require line-by-line comparison with the United Nations Treaty Collection text published at treaties.un.org. For any work product that will be delivered to a client or used to structure a transaction, independent verification is not optional.

In practical terms, this means establishing a short checklist for any AI-assisted research on the BBNJ Agreement: confirm the article number cited, confirm the operative threshold or standard verbatim, and confirm whether a provision is stated as a default or an opt-in. These three checks would have caught every error in this cell. Firms and chambers with active BBNJ practices should consider building treaty-text lookups directly into the research workflow rather than relying on AI to supply article-level precision.

AI tools remain useful for orientation on the BBNJ Agreement: understanding the broad structure, identifying which parts of the treaty address a given topic, and generating first-draft outlines of advice memoranda. The hazard lies in trusting AI to supply precise article numbers, operative thresholds, and default rules without verification. Given the treaty text is freely and publicly accessible, the cost of verification is low; the cost of propagating an inverted retroactivity rule or a misattributed screening article into client advice is not.

How RLB Can Help

RegLeg's published Hallucination Research is available as a free pre-flight check for lawyers working on regulatory matters. Before relying on AI-assisted output, whether for advice, drafting, or due diligence, lawyers can consult the research to understand which failure modes have been observed for the specific regulation in question. This is not a substitute for legal judgement; it is a structured, independent reference that flags where AI tools have historically misfired, allowing practitioners to focus their human verification effort on the highest-risk points.

For firms where multiple lawyers work across the same regulatory portfolio, RegLeg offers bespoke deep-dive engagements. These examine the specific regulations, jurisdictions, and question types most relevant to the firm's practice. The output is a tailored briefing that legal teams can use as a standing reference, updated as the regulatory landscape evolves, giving the whole team a shared, consistent picture of where AI tools should be treated with caution and where they have performed reliably.

RegLeg also works with legal teams on training and CPD-aligned content. This covers the categories of failure lawyers are most likely to encounter (outdated regulatory text, cross-jurisdictional confusion, misattributed citations) framed around real regulatory examples rather than abstract AI theory. RegLeg can also conduct a confidential review of a firm's existing AI-use policy, assessing it against the failure-mode catalogue the research has surfaced. The output is a structured gap analysis.

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.