Title 19 › CHAPTER 29 — UNITED STATES–MEXICO–CANADA AGREEMENT IMPLEMENTATION › SUBCHAPTER I — APPROVAL OF, AND GENERAL PROVISIONS RELATING TO, THE USMCA › § 4512
When the USMCA conflicts with a United States law, the United States law wins. The USMCA does not change or limit any U.S. law or government power unless the Act clearly says it does. A State law cannot be declared invalid for clashing with the USMCA unless the United States brings the case. "State law" includes local government laws and state insurance rules. Only the United States can use the USMCA in court; private people or businesses cannot sue or use the USMCA as a legal defense or to challenge government actions.
Full Legal Text
Customs Duties, Source: USLM XML via OLRC
Legislative History
Reference
Citation
19 U.S.C. § 4512
Title 19, Customs Duties
Last Updated
Sep 22, 2026
Release point: 119-110