19 USC § 4581 - References in part

---
identifier: "/us/usc/t19/s4581"
source: "usc"
legal_status: "official_prima_facie"
title: "19 USC § 4581 - References in part"
title_number: 19
title_name: "CUSTOMS DUTIES"
section_number: "4581"
section_name: "References in part"
chapter_number: 29
chapter_name: "UNITED STATES–MEXICO–CANADA AGREEMENT IMPLEMENTATION"
subchapter_number: "IV"
subchapter_name: "ANTIDUMPING AND COUNTERVAILING DUTIES"
part_number: "A"
part_name: "Dispute Settlement"
positive_law: false
currency: "119-84"
last_updated: "2026-04-17"
format_version: "1.1.0"
generator: "[email protected]"
source_credit: "(Pub. L. 116–113, title IV, § 411, formerly Pub. L. 103–182, title IV, § 401, Dec. 8, 1993, 107 Stat. 2129; renumbered § 411 of Pub. L. 116–113 and amended Pub. L. 116–113, title V, § 504(b), Jan. 29, 2020, 134 Stat. 72.)"
---


# § 4581. References in part

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.

---

**Source Credit**: (Pub. L. 116–113, title IV, § 411, formerly Pub. L. 103–182, title IV, § 401, Dec. 8, 1993, 107 Stat. 2129; renumbered § 411 of Pub. L. 116–113 and amended Pub. L. 116–113, title V, § 504(b), Jan. 29, 2020, 134 Stat. 72.)

## Editorial Notes

### Codification

Section was formerly classified to  prior to renumbering by .

### Amendments

2020—, substituted “the USMCA” for “the Agreement”.

## Statutory Notes and Related Subsidiaries

### Effective Date of 2020 Amendment

> **“(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.”

, , , provided that:

[For definition of “USMCA” as used in , set out above, see .]