A programmer can item at any row of code and see who wrote it, when, and what the document looked akin on any former day. A attorney study a national statute normally cannot, at smallest not without an midday in the notes at the ft of the section. But why shouldn't they have the same, convenient scheme of record? It is particularly applicable stated that so much first-pass lawful investigation now runs through tongue models, which are frequently unable to utilise the appropriate lineage of a law, handcuffing its capability to recommendation interpretation.
The US code
Outside the titles Congress has enacted as affirmative law, the code is lone celebrity facie evidence of the law, and the Statutes at Large govern anywhere the two differ.[1] The Office of the Law Revision Counsel publishes it as a sequence of publish points, all current through a named community law, and keeps reorganising it; a invoice to enact heading 41 as affirmative law was introduced in September 2025.[2] Which community law wrote a declaration is recorded in amendment notes, in prose. When a alter took consequence is frequently in a distinct effective-date note, and anywhere Congress stated nothing the default regulation is that a law takes consequence on the day it is enacted.[3]
The definition of a small endeavor debtor in 11 USC § 1182(1) shows how far distinct those answers can be. It was created in 2019 alongside the existing small endeavor debt limit.[4] The CARES Act raised the bounds to $7.5 myriad in March 2020 as a impermanent measure, afterward extended to March 2022.[5],[6] That addition lapsed on 27 March 2022, and on 21 June 2022 Congress restored it for two additional years, for cases commenced on or following 27 March 2020 and motionless pending, which reached rear complete the gap.[7] The higher bounds expired again in June 2024, and following the triennial adaptation in April 2025 it stands at $3,424,000.[8],[9] For a case submitted in May 2022, the publish item printed at the period gives the lesser limit, and lone a afterward Act changes the answer. A former that is helpful to a attorney has to transport the text, the date all alter took force, and the range of any law that reaches back.
A study from the Technical University of Munich this twelvemonth established two failures in models answering questions on German statutes: they use rules that were superseded following their training cutoff, and they favor the newer provision equal whenever an older one governs the facts. One example answered 24% of post-cutoff questions correctly on its own and 87% whenever the applicable statutory content was retrieved for it, and the authors decide that temporal validity have to be treated as a difficult constraint.[10] Other latest activity trains hunt agents to regard the date a inquiry is about, alongside ample gains in consistency.[11]
Asking a example to create the old content does not resolve this. When the identical Munich collection had a example use German amending laws to before versions, the output looked 93–99% akin to the authoritative text, but lone fractional of sole amendments and a fifth of chains of amendments matched exactly, and experts established legally important errors in the near misses.[12] The former have to be checkable.
For all brace of publish points from 2017 onward, we took the community laws enacted in between, carried out their amending instructions on the older content in date order, and compared the outcome alongside the newer version. Of 365 changes throughout the nine titles, 361 reproduced the next publish item exactly. The another four are shown alongside a tag saying how far they could be confirmed. Each alter afterward carries the law and the date it took effect: 261 took consequence on act by default, 72 by an effective-date note and 29 by a date in the amendment itself. One depends on an agency decision that may never come, and we depart it out of the content fairly than guess.
With that record, the audience can answer the questions lawyers ask. You choice a date and get the content in power on it, alongside the words that peruse alternatively today marked. Each expression is coloured by the Act that wrote it. A alter to a defined term lists all another provision that uses it, and you can prosecute a division to see what has changed since your final visit.
Limits
It does not yet display a afterward law’s attain rear on the before dates it covers, so for a case submitted in the 2022 gap it shows the lesser bounds without alert that the June 2022 Act changed the answer.
Effective-date notes are peruse by pattern, and different wording falls rear to the date of enactment.
Each alter links to the law’s own words, and for item that matters the first have to be read.
We're additionally motionless thinking concerning the correct form aspect this should take.
References
- 1 USC § 204(a) <www.law.cornell.edu/uscode/text/1/204>
- Office of the Law Revision Counsel, ‘Positive Law Codification: Title 41’ (H.R. 5185, 119th Congress, introduced 8 September 2025) <uscode.house.gov/codification/t41/index.html>
- Gozlon-Peretz v United States 498 US 395, 404 (1991) <www.law.cornell.edu/supremecourt/text/498/395>
- Small Business Reorganization Act of 2019, Pub L 116-54 <www.govinfo.gov/content/pkg/PLAW-116publ54/html/PLAW-116publ54.htm>
- Coronavirus Aid, Relief, and Economic Security Act, Pub L 116-136, s 1113 <www.govinfo.gov/content/pkg/PLAW-116publ136/html/PLAW-116publ136.htm>
- COVID-19 Bankruptcy Relief Extension Act of 2021, Pub L 117-5 <www.govinfo.gov/content/pkg/PLAW-117publ5/html/PLAW-117publ5.htm>
- Bankruptcy Threshold Adjustment and Technical Corrections Act, Pub L 117-151, s 2(h)–(i) <www.govinfo.gov/content/pkg/PLAW-117publ151/html/PLAW-117publ151.htm>
- Judicial Conference of the United States, ‘Adjustment of Certain Dollar Amounts Applicable to Bankruptcy Cases’ 90 Fed Reg 8941 (4 February 2025) <www.govinfo.gov/content/pkg/FR-2025-02-04/html/2025-02207.htm>
- US Trustee Program, ‘Subchapter V’ (US Department of Justice) <www.justice.gov/ust/subchapter-v>
- Max Prior, Andreas Schultz and Matthias Grabmair, ‘Asking For An Old Friend: Diagnosing and Mitigating Temporal Failure Modes in LLM-based Statutory Question Answering’ (arXiv:2605.23497, 22 May 2026) <arxiv.org/abs/2605.23497>
- Wei Fan and others, ‘Can LLMs Time Travel? Enhancing Temporal Consistency in Legal Agentic Search through Reinforcement Learning’ (arXiv:2605.25920, revised 19 September 2026) <arxiv.org/abs/2605.25920>
- Max Prior, Adrian Hof, Niklas Wais and Matthias Grabmair, ‘Risks and Limits of Automatic Consolidation of Statutes’ in Proceedings of the Natural Legal Language Processing Workshop 2025 (ACL, November 2025) 396 <aclanthology.org/2025.nllp-1.29/>
