US Code history: every change traced to the law that made it | Lexifina Watch

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  1. Lexifina Watch
  2. US Code

The record follows titles 1, 3, 4, 9, 11, 13, 17, 35 and 39 of the US Code through the annual editions from 2017 to 2024 and the release points since, up to Pub. L. 119–134. Each change names the public law and the bill behind it, and sets the law's own words beside the text they changed.

365changes, each with its cause

33public laws, each with its bill

9titles of the Code

13versions of the text compared

  1. Title 1

    General Provisions

    Most recently changed by the James M. Inhofe National Defense Authorization Act for Fiscal Year 2023, enacted December 23, 2022.

  2. Title 3

    The President

    Most recently changed by the Consolidated Appropriations Act, 2023, enacted December 29, 2022.

  3. Title 4
  4. Title 9

    Arbitration

    Most recently changed by the Ending Forced Arbitration of Sexual Assault and Sexual Harassment Act of 2021, enacted March 3, 2022.

  5. Title 11

    Bankruptcy

    Most recently changed by the Bankruptcy Administration Improvement Act of 2025, enacted February 6, 2026.

  6. Title 13

    Census

    Most recently changed by the Foundations for Evidence-Based Policymaking Act of 2018, enacted January 14, 2019.

  7. Title 17

    Copyrights

    Most recently changed by the National Defense Authorization Act for Fiscal Year 2026, enacted December 18, 2025.

  8. Title 35

    Patents

    Most recently changed by the Pub. L. 118–151, enacted December 17, 2024.

  9. Title 39

    Postal Service

    Most recently changed by the National Defense Authorization Act for Fiscal Year 2026, enacted December 18, 2025.

Every law that changed these titles in this time, newest first. One law can change several titles at once.

  1. February 6, 2026
  2. December 18, 2025

    National Defense Authorization Act for Fiscal Year 2026

    Public Law 119-60 amended section 105(d)⁠(2) of title 17 by inserting “Uniformed Services University of the Health Sciences” as subparagraph (L) and redesignating former subparagraphs (L) through (N) as (M) through (O). It also updated section 105(c)⁠(1) through (4) to match the new lettering in subsection (d)⁠(2), replacing the older cross-references with the new subparagraph references.

  3. December 23, 2024
  4. December 17, 2024
  5. March 9, 2024
  6. December 22, 2023
  7. January 5, 2023
  8. December 29, 2022
  9. December 27, 2022
  10. December 23, 2022

    James M. Inhofe National Defense Authorization Act for Fiscal Year 2023

    The law amended section 112a of title 1 to require the Department of State to make unpublished copies of certain international agreements and qualifying non-binding instruments available on request, and it struck the prior subsections in that section. It also rewrote section 112b of title 1 to require monthly written reports to congressional leaders and committees on international agreements and qualifying non-binding instruments, and it changed the section heading to "United States international agreements and non-binding instruments; transparency provisions".

  11. December 20, 2022

    Patents for Humanity Act of 2022

    The law added section 28 to title 35. Section 28 establishes a competition that awards certificates to accelerate certain Patent and Trademark Office matters.

  12. December 13, 2022

    Respect for Marriage Act

    Public Law 117-228 rewrote section 7 of title 1 to define marriage for Federal law as a marriage between 2 individuals that is valid where entered into, and it added related definitions and validity rules. It also replaced the heading for section 7 with "Marriage".

  13. October 17, 2022

    Artistic Recognition for Talented Students Act

    Public Law 117-201 amended section 708 of title 17 by adding subsection (e). That new subsection waives certain registration fees for works that win a covered competition in section 708 of title 17.

  14. June 21, 2022

    Bankruptcy Threshold Adjustment and Technical Corrections Act

    The law changed several title 11 definitions and cross-references. It inserted “under this title” in section 101(51D)⁠(B)⁠(i), replaced section 101(51D)⁠(B)⁠(iii), and added section 1182(1) to the cross-references in section 104(a) and section 104(b). It rewrote section 109(e) to limit chapter 13 debtors to individuals with regular income owing less than $2,750,000 in noncontingent, liquidated debts, and it rewrote section 1182(1) with a longer definition for a person engaged in commercial or business activities. It also changed subchapter V provisions in section 1183(b)⁠(5) and section 1191(c) by adjusting the debtor-in-possession language, adding authority to operate the business, and splitting the payment-ability test and reasonable-likelihood test into separate subparagraphs.

  15. April 6, 2022

    Postal Service Reform Act of 2022

    Postal Service Reform Act of 2022 amended title 39 to require an integrated Postal Service network with delivery at least six days a week, and it changed the general postal policy language to require service that is prompt, economical, consistent, and reliable, with operational efficiency and reduced complexity. It also changed Postal Regulatory Commission governance and funding rules, including joint appointment of the Commission’s chief officer, a new budget process for the Commission, and the removal of a former subsection in section 504. The Act added chapter 37 provisions authorizing nonpostal products and services, definitions, intergovernmental agreements, programs for other agencies, annual reporting, and performance targets, and it also added section 2903 on sale proceeds after permanent cessation of operations.

  16. March 3, 2022
  17. December 27, 2021
  18. September 30, 2021
  19. March 27, 2021

    COVID-19 Bankruptcy Relief Extension Act of 2021

    Public Law 117-5 amended section 1329(d)⁠(1) of title 11 by replacing the words "this subsection" with "the COVID–19 Bankruptcy Relief Extension Act of 2021". The change updated the cross-reference in section 1329(d)⁠(1) to name the Act directly.

  20. January 12, 2021

    Bankruptcy Administration Improvement Act of 2020

    Public Law 116-325 amended title 11 by adding section 330(e). That new provision established the Chapter 7 Trustee Fund in the Treasury and made deposits available for trustee payments for fiscal years 2021 through 2026.

  21. January 1, 2021

    William M. (Mac) Thornberry National Defense Authorization Act for Fiscal Year 2021

    The law amended section 412 of title 3 to add a new subsection (c) allowing covered employees to substitute available paid leave for unpaid leave under section 102(a)⁠(1)⁠(A) or (B) of the Family and Medical Leave Act of 1993, and it added a new subsection (a)⁠(3) exempting that leave from the 12-month and 1,250-hour eligibility requirement. It also redesignated former subsections (c) and (d) as subsections (d) and (e), and it made conforming changes to subsection (d), including adding a regulations clause in subsection (d)⁠(2)⁠(C) and updating subsection (e)⁠(1) to refer to subsection (c) as in effect on the date of enactment of the Presidential and Executive Office Accountability Act.

  22. December 27, 2020

    Consolidated Appropriations Act, 2021

    The Act amended section 112b of title 1 by adding subsection (g). The new subsection states Congress’s sense that the executive branch should not include specific legislative text in a treaty or executive agreement without congressional authorization.

  23. October 30, 2020
  24. March 27, 2020
  25. December 20, 2019

    Further Consolidated Appropriations Act, 2020

    The law revised section 119 of title 17 by renumbering and deleting several paragraphs and subsections, changing cross-references, and updating the cable and satellite compulsory license rules, including local-into-local service language and short market provisions. It also updated related references in section 501(e), changed pay rules for the Register and Associate Register of Copyrights in section 701(f), and revised staffing and pay provisions for the Copyright Royalty Judges in sections 802 and 803.

  26. December 20, 2019
  27. August 23, 2019

    Small Business Reorganization Act of 2019

    Made 40 changes to title 11: added sections 1181 to 1195 and changed sections 101, 103, 322, 326, 347, 363, 364, 523, 524, 547, 557, 1102 and 1146.

  28. August 23, 2019
  29. August 23, 2019

    Family Farmer Relief Act of 2019

    Public Law 116-51 amended section 101(18) of title 11. It replaced the dollar amount "$3,237,000" with "$10,000,000" each time that amount appears in section 101(18).

  30. January 14, 2019

    Foundations for Evidence-Based Policymaking Act of 2018

    Section 402 of title 13 was amended to replace the reference to "the Confidential Information Protection and Statistical Efficiency Act of 2002" with "section 3576(e) of title 44". This changed the cross-reference used in section 402 of title 13.

  31. October 11, 2018

    Orrin G. Hatch-Bob Goodlatte Music Modernization Act

    The law rewrote section 114(f) and changed section 114(g) to set new statutory royalty procedures, new distribution rules, a mechanism for letters of direction, and a rule that preempts State escheatment or abandoned property laws for covered receipts. It overhauled section 115 by changing the compulsory license rules, adding a blanket license for digital uses, and creating the mechanical licensing collective and digital licensee coordinator. It also rewrote section 301(c) to place pre-1972 sound recordings outside title 17 copyright protection, and added section 1401 to set unauthorized use rules and transition periods for those recordings.

  32. October 9, 2018
  33. February 9, 2018

    Bipartisan Budget Act of 2018

    Public Law 115-123 amended section 7(m) of title 4 to add the death of a first responder working in any State, territory, or possession who dies while serving in the line of duty, and to add first responders working in the District of Columbia. It also made conforming punctuation and text changes in section 7(m), including changes in section 7(m)⁠(2) and section 7(m)⁠(3), and added new provisions at the end of section 7(m).

February 6, 2026

Raised '$45' to '$105' in section 330(b)⁠(1) of title 11.

Pub. L. 119–76, §3(a)(1)

February 6, 2026

Struck subsection (e) from section 330 of title 11.

Pub. L. 119–76, §3(a)(2)

December 18, 2025

Redesignated subparagraphs (L) through (N) as (M) through (O), and added "Uniformed Services University of the Health Sciences" in section 105(d)⁠(2) of title 17.

Pub. L. 119–60, div. A, title XVII, §1702(a)(1)

December 18, 2025

Inserted subparagraph (L), Uniformed Services University of the Health Sciences, in section 105(d)⁠(2) of title 17.

Pub. L. 119–60, div. A, title XVII, §1702(a)(2)

December 18, 2025

In section 105(c)⁠(1), replaced “subparagraphs (A) through (K) of subsection (d)⁠(2) and subparagraph (L)” with “subparagraphs (A) through (L) of subsection (d)⁠(2) and subparagraph (M)”.

Pub. L. 119–60, div. A, title XVII, §1702(b)(1)

December 18, 2025

In section 105(c)⁠(2), replaced “subsection (d)⁠(2)⁠(L)” with “subsection (d)⁠(2)⁠(M)”.

Pub. L. 119–60, div. A, title XVII, §1702(b)(2)

Each version of a title is compared with the one before. For every difference, the record finds the law whose amending instruction produces it, word for word. The methodology sets out each step, with a worked example, the results for each title and the limits of the record.