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Research Hub/Law & AI: Regulation, Liability, and the Courts

Law & AI: Regulation, Liability, and the Courts

How legal systems are absorbing artificial intelligence

TL;DR

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.

Updated 2026-06-0517 sources validated

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€35M / 7%

EU AI Act max fine (Art. 99)

EU AI Act

$1.5B

Anthropic copyright settlement

Authors Guild

1,200+

Documented AI-hallucination cases

Charlotin / Bloomberg Law

79%

Legal pros using AI tools (2025)

ABA Legal Industry Report

01

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 force

Eight 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 force

General-purpose AI model providers face transparency, copyright-policy, and systemic-risk duties. Governance bodies stood up.

High-risk systems (Aug 2026–2028)

Phasing in

Conformity 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)

Enforcement

Up to €35M or 7% of global turnover for prohibited use; €15M or 3% for other breaches — whichever is higher.

02

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 flux

First 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 force

Responsible AI Governance Act, effective Jan 1, 2026. Intent-based: bans specific harmful uses rather than EU-style risk tiers.

NIST AI RMF

Voluntary

Voluntary 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

Gap

Federal action runs through executive orders and agency guidance, which shift with administrations — leaving states as the primary lawmakers.

03

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)

Landmark

Judge 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 ruling

First 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

Pending

Court 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)

UK

High Court, Nov 2025: model weights are not a "copy" under UK law; Getty dropped its primary copyright claims mid-trial. Narrow trademark win only.

04

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

Settled

Thaler 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

Withdrawn

The 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

Harmonized

Revised PLD (adopted 2024) expressly covers software and AI as products, addressing post-sale updates and machine learning.

The allocation gap

Open

When an AI service causes harm, who pays — developer, deployer, or user? In the EU this now depends on which member state you are in.

05

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

Mainstream

79% 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)

Precedent

The origin case: $5,000 Rule 11 sanction for ChatGPT-fabricated citations. Now the cautionary tale cited in standing orders nationwide.

The hallucination tracker

Growing

Damien 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.

06

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 scoring

Wisconsin 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 evidence

Found 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 process

Robert 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

Rights

Gives 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

1

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

2

The US has no comprehensive federal AI law; regulation is a shifting state patchwork (Colorado, Texas TRAIGA) plus the voluntary NIST AI RMF

3

Bartz v. Anthropic (2025) split fair use: training on legally bought books is transformative, but pirated copies cost a record $1.5B settlement

4

Thomson Reuters v. Ross (2025) was the first major AI-training copyright ruling — infringement, not fair use — but limited to non-generative AI

5

Thaler v. Perlmutter settled that US copyright requires a human author; SCOTUS denied review in 2026

6

AI-fabricated legal citations exceeded 1,200 documented cases by early 2026, beginning with the $5,000 sanction in Mata v. Avianca

7

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

8

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
Evidence Grade:Grade A(Peer-reviewed / meta-analyses)

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

[2]
EU AI Act Implementation Timeline
Future of Life InstituteOfficial Docs2025
[4]
SB24-205 — Consumer Protections for Artificial Intelligence
Colorado General AssemblyOfficial Docs2024
[5]
The Texas Responsible AI Governance Act (TRAIGA)
Norton Rose FulbrightBlog / Analysis2025
[6]
Thaler v. Perlmutter, No. 23-5233 — Opinion (human authorship)
U.S. Court of Appeals, D.C. CircuitOfficial Docs2025-03-18
[8]
Thomson Reuters v. Ross Intelligence — Summary Judgment Opinion
U.S. District Court, D. DelawareOfficial Docs2025-02
[9]
Bartz v. Anthropic — Order on Fair Use
Copyright AllianceOfficial Docs2025-06
[13]
The Legal Industry Report 2025 — AI Adoption Survey
American Bar AssociationIndustry Report2025
[16]
State v. Loomis, 2016 WI 68 — Opinion (COMPAS risk scoring)
Wisconsin Supreme CourtOfficial Docs2016-07