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Fabio 76b8ec33a7 Legal corpus: the complete U.S. Code (59,740 sections, all 53 titles)
Ingested titles 12–51 and 54 from OLRC USLM XML @119-100 (the whole Code
now, uniform edition; Title 53 is reserved/empty). LegalText 11,221 ->
59,740; repo total 105,704 records. Deterministic (byte-identical rerun,
verified on Title 42's 8,356 sections); make check green. make
legal-us-code default now covers every title.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
2026-07-06 10:51:44 -04:00

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---
type: "LegalText"
title: "19 U.S.C. § 4581"
description: "References in part"
jurisdiction: "us"
corpus: "united_states_code"
kind: "code_section"
title_number: 19
title_name: "CUSTOMS DUTIES"
chapter_number: "29"
chapter_name: "UNITED STATESMEXICOCANADA AGREEMENT IMPLEMENTATION"
section: "4581"
citation: "19 U.S.C. § 4581"
status: "current"
release_point: "119-100"
release_date: "2026-06-26"
source: "official"
source_url: "https://uscode.house.gov/download/releasepoints/us/pl/119/100/xml_usc19@119-100.zip"
source_identifier: "/us/usc/t19/s4581"
source_file: "data/legal/raw/us/code/title-19/usc19.xml"
source_hash: "9a34816d5f167f4dd5ac07584e3848bb89d7a5bc7ee3e975587d47dce8ba7a6e"
raw_snapshot_hash: "c90da65eeb9b6895d254e48af923eedc3b1275c7e88d986eb56f934bfcdfdf5c"
text_hash: "3c99deececbee6f0f45615dede224a18ea5f545a20e5c7680fcb00a85716639c"
retrieved_at: "2026-07-04"
confidence: "official"
tags: ["legal", "us-code"]
---
# 19 U.S.C. § 4581 - References in part
## Text
Any reference in this part to an Annex, chapter, or article shall be considered to be a reference to the respective Annex, chapter, or article of the USMCA.
(Pub. L. 116113, title IV, § 411, formerly Pub. L. 103182, title IV, § 401, Dec. 8, 1993, 107 Stat. 2129; renumbered § 411 of Pub. L. 116113 and amended Pub. L. 116113, title V, § 504(b), Jan. 29, 2020, 134 Stat. 72.)
## Notes
Editorial Notes
Codification Section was formerly classified to section 3431 of this title prior to renumbering by Pub. L. 116113.
Amendments2020—Pub. L. 116113, § 504(b)(3), substituted “the USMCA” for “the Agreement”.
Statutory Notes and Related Subsidiaries
Effective Date of 2020 AmendmentPub. L. 116113, title V, § 504(k), Jan. 29, 2020, 134 Stat. 76, provided that: “(1) In general.—Each transfer, redesignation, and amendment made by this section [transferring sections 3431 to 3438 of this title, respectively, to and amending sections 4581 to 4588 of this title] shall take effect on the date on which the USMCA enters into force [July 1, 2020], but shall not apply—“(A) to any final determination described in paragraph (1)(B) or clause (i), (ii), or (iii) of paragraph (2)(B) of section 516A(a) of the Tariff Act of 1930 (19 U.S.C. 1516a(a)) notice of which is published in the Federal Register before such date, or to a determination described in paragraph (2)(B)(vi) of that section notice of which is received by the Government of Canada or Mexico before such date; and “(B) to any binational panel review under NAFTA, or any extraordinary challenge arising out of any such review, that was commenced before such date. “(2) Transition from nafta.—The transfers, redesignations, and amendments made by this section shall not apply, and the provisions of title IV of the North American Free Trade Agreement Implementation Act [19 U.S.C. 3431 et seq.], as in effect on the day before the date on which the USMCA enters into force, shall continue to apply on and after that date with respect—“(A) to any final determination described in paragraph (1)(B) or clause (i), (ii), or (iii) of paragraph (2)(B) of section 516A(a) of the Tariff Act of 1930 (19 U.S.C. 1516a(a)) notice of which is published in the Federal Register before such date, or to a determination described in paragraph (2)(B)(vi) of that section notice of which is received by the Government of Canada or Mexico before the date on which the USMCA enters into force; and “(B) to any binational panel review under NAFTA, or any extraordinary challenge arising out of any such review, that was commenced before the date on which the USMCA enters into force.” [For definition of “USMCA” as used in section 504(k) of Pub. L. 116113, set out above, see section 4502 of this title.]