Law & AI: Regulation, Liability, and the Courts
How legal systems are absorbing artificial intelligence
AI law is consolidating fast. The EU AI Act is now phasing in — prohibited practices live since Feb 2025, GPAI rules since Aug 2025, high-risk obligations landing 2026–2028 — with fines up to €35M or 7% of global turnover. US regulation is a state-by-state patchwork (Colorado, Texas TRAIGA, NIST AI RMF) with no comprehensive federal law. The training-data wars are splitting: Anthropic won a transformative-use ruling on legally bought books but paid a record $1.5B for pirated ones; Thomson Reuters beat Ross on non-generative copying; the NYT case is heading to trial. Courts insist on human authorship (Thaler), AI-fabricated citations have produced 1,200+ documented cases and growing, and the EU withdrew its AI Liability Directive in 2025, leaving service liability to fragmented national law.
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Subscribe€35M / 7%
EU AI Act max fine (Art. 99)
EU AI Act
1,200+
Documented AI-hallucination cases
Charlotin / Bloomberg Law
79%
Legal pros using AI tools (2025)
ABA Legal Industry Report
The EU AI Act: The World’s First Comprehensive AI Law
The EU AI Act entered into force on 1 August 2024 and phases in over several years, regulating AI by risk tier rather than by technology. It is the de facto global benchmark — a "Brussels effect" template other jurisdictions are measuring themselves against. Penalties are GDPR-scale: up to €35M or 7% of worldwide annual turnover for deploying a prohibited system.
Prohibited practices (live Feb 2, 2025)
In forceEight banned uses including social scoring, untargeted facial-recognition scraping, and most real-time remote biometric ID in public. Plus AI-literacy duties.
GPAI model obligations (Aug 2, 2025)
In forceGeneral-purpose AI model providers face transparency, copyright-policy, and systemic-risk duties. Governance bodies stood up.
High-risk systems (Aug 2026–2028)
Phasing inConformity assessments, risk management, human oversight for AI in hiring, credit, education, and justice. General date Aug 2, 2026; product-embedded systems to 2027–2028.
Fine ceilings (Art. 99)
EnforcementUp to €35M or 7% of global turnover for prohibited use; €15M or 3% for other breaches — whichever is higher.
The US Patchwork: No Federal Law, Fifty Experiments
The United States has no comprehensive federal AI statute. Regulation is emerging state-by-state and through voluntary frameworks, producing a compliance patchwork that is the mirror image of the EU’s single regime. The center of gravity is shifting between sessions as states amend and supersede their own first drafts.
Colorado AI Act
In fluxFirst comprehensive US state AI law (SB24-205). Effective date pushed to June 2026, then superseded by SB 26-189 — now effective Jan 1, 2027. A live example of regulatory churn.
Texas TRAIGA
In forceResponsible AI Governance Act, effective Jan 1, 2026. Intent-based: bans specific harmful uses rather than EU-style risk tiers.
NIST AI RMF
VoluntaryVoluntary federal framework (AI RMF 1.0, Jan 2023). The Generative AI Profile (Jul 2024) names 12 GenAI risk areas. Soft law, widely cited in contracts.
No federal statute
GapFederal action runs through executive orders and agency guidance, which shift with administrations — leaving states as the primary lawmakers.
The Training-Data Wars: Copyright Meets the Corpus
The central legal question of generative AI is whether training on copyrighted works is fair use. Through 2025 the courts split the question in two: how the data was acquired matters as much as what the model does with it. These rulings are reshaping fair-use doctrine in real time.
Bartz v. Anthropic (2025)
LandmarkJudge Alsup: training on legally bought books is "exceedingly transformative" fair use — but using pirated copies is not. Followed by a record $1.5B settlement over pirated works.
Thomson Reuters v. Ross (2025)
First rulingFirst major AI-training copyright ruling. Copying 2,243 Westlaw headnotes was infringing, not fair use — but expressly limited to non-generative AI.
NYT v. OpenAI/Microsoft
PendingCourt denied most of OpenAI’s motion to dismiss (2025); core infringement claims proceed to discovery. The marquee fair-use trial still ahead.
Getty v. Stability AI (UK)
UKHigh Court, Nov 2025: model weights are not a "copy" under UK law; Getty dropped its primary copyright claims mid-trial. Narrow trademark win only.
Who Owns AI Output — and Who Is Liable
Two doctrines are settling. On authorship, US courts require a human creator: purely AI-generated works cannot be copyrighted. On liability, the EU has fractured — product liability is harmonized, but fault-based service liability reverted to national law after the AI Liability Directive was abandoned.
Human authorship required
SettledThaler v. Perlmutter (D.C. Cir., 2025): the Copyright Act requires a human author. SCOTUS denied cert in 2026, settling the rule. The Copyright Office agrees.
AI Liability Directive withdrawn
WithdrawnThe EU abandoned the AILD in 2025 for lack of consensus — leaving AI-as-a-service fault liability to 27 fragmented national regimes.
Product Liability Directive
HarmonizedRevised PLD (adopted 2024) expressly covers software and AI as products, addressing post-sale updates and machine learning.
The allocation gap
OpenWhen an AI service causes harm, who pays — developer, deployer, or user? In the EU this now depends on which member state you are in.
AI in the Courtroom: Adoption and the Hallucination Problem
Legal practice is adopting AI faster than almost any profession — and discovering its failure modes in public. Fabricated case citations have become a recurring sanctionable event, tracked in a live database that crossed a thousand cases in early 2026.
Rapid adoption
Mainstream79% of legal professionals reported using AI tools in 2025, up from 19% in 2023. Roughly half of Am Law 100 firms use Harvey.
Mata v. Avianca (2023)
PrecedentThe origin case: $5,000 Rule 11 sanction for ChatGPT-fabricated citations. Now the cautionary tale cited in standing orders nationwide.
The hallucination tracker
GrowingDamien Charlotin’s database logged ~712 cases by Dec 2025 and ~1,227 by early 2026, with 5–6 new filings per day at peak.
Mostly warnings
Enforcement~90% of proceedings end in warnings or struck material; fines, when imposed, run from a few hundred to several thousand dollars.
Bias, Due Process, and Automated Decisions
Before generative AI, the hardest AI-law questions were about consequential automated decisions — sentencing, policing, and benefits. Those cases established the fault lines the new statutes are now trying to codify.
State v. Loomis (2016)
Risk scoringWisconsin upheld COMPAS risk scores in sentencing but required warnings: scores rely on group data, were never validated locally, and cannot be determinative.
ProPublica / COMPAS
Bias evidenceFound Black defendants falsely flagged high-risk at 44.9% vs 23.5% for white defendants — the study that put algorithmic bias on the legal map.
Facial-recognition arrests
Due processRobert Williams (Detroit, 2020) was the first known US wrongful arrest from a face-match; Detroit settled for $300,000. At least seven such cases are public.
GDPR Article 22
RightsGives individuals the right not to be subject to solely-automated decisions with legal effect — the EU’s long-standing backstop, now reinforced by the AI Act.
Key Findings
The EU AI Act phases in 2025–2028 with fines up to €35M or 7% of global turnover — the de facto global benchmark for AI regulation
The US has no comprehensive federal AI law; regulation is a shifting state patchwork (Colorado, Texas TRAIGA) plus the voluntary NIST AI RMF
Bartz v. Anthropic (2025) split fair use: training on legally bought books is transformative, but pirated copies cost a record $1.5B settlement
Thomson Reuters v. Ross (2025) was the first major AI-training copyright ruling — infringement, not fair use — but limited to non-generative AI
Thaler v. Perlmutter settled that US copyright requires a human author; SCOTUS denied review in 2026
AI-fabricated legal citations exceeded 1,200 documented cases by early 2026, beginning with the $5,000 sanction in Mata v. Avianca
The EU withdrew its AI Liability Directive in 2025, leaving AI-service fault liability to fragmented national law while the Product Liability Directive covers AI as a product
79% of legal professionals reported using AI tools in 2025, up from 19% in 2023 — one of the fastest-adopting professions
Research Transparency
Limitations
- •AI law is changing monthly — effective dates (especially Colorado and the EU high-risk tier) shift with amendments and the EU "omnibus" simplification
- •Copyright rulings are mostly district-court decisions that may be appealed or split across circuits; the marquee NYT v. OpenAI fair-use trial is unresolved
- •Legal-tech market-size dollar figures come only from commercial vendors and are not asserted here; adoption percentages are from ABA surveys
- •The Charlotin hallucination database is a live tracker; counts carry a date because they rise daily
What We Don't Know
- ?How the NYT v. OpenAI fair-use question will ultimately be decided — the single most consequential open AI-copyright case
- ?Whether the US will pass any comprehensive federal AI law, or remain a state patchwork
- ?How AI-service liability will be resolved in the EU after the AI Liability Directive’s withdrawal
- ?Whether the EU AI Act’s high-risk regime will be enforced as written or softened before the 2026–2028 deadlines
Frequently Asked Questions
The EU AI Act is the world’s first comprehensive AI law. It entered into force on 1 August 2024 and phases in by risk tier: prohibited practices and AI-literacy duties since 2 February 2025, general-purpose AI model obligations since 2 August 2025, and high-risk system obligations from 2 August 2026 (with product-embedded systems extending to 2027–2028). Fines reach up to €35M or 7% of global annual turnover.
Sources & References
17 validated sources · Last updated 2026-06-05