Title 19 › CHAPTER 29 — UNITED STATES–MEXICO–CANADA AGREEMENT IMPLEMENTATION › SUBCHAPTER II — CUSTOMS PROVISIONS › § 4531
Sets the rules for when a product counts as “originating” under the USMCA so it can get special tariff treatment. A product is originating if it was wholly obtained in USMCA countries, made only from originating parts, or made in USMCA countries using some nonoriginating parts but still meeting the treaty rules. Makers can use one of two tests to show this: the transaction value test (at least 60% regional value) or the net cost test (at least 50% regional value), unless a specific rule requires using net cost. Small amounts of nonoriginating inputs are allowed (generally up to 10% by value) with many specific exceptions for foods, textiles, and other items. Rules also cover remanufactured goods, how parts from different USMCA countries count together, how fungible (interchangeable) items are treated, how packaging, accessories, and indirect items like fuel are handled, transit and re-export limits, and that the rules take effect when USMCA enters force. Key defined words include: aquaculture (farming aquatic life); Customs Valuation Agreement (valuation rules); fungible good (interchangeable item); originating good/material (meets origin rules); nonoriginating good/material (does not); producer (maker); material (part or ingredient); indirect material (used but not in the product, like fuel or tools); intermediate material (self-made input); net cost and total cost (how costs are counted); nonallowable interest (interest over 700 basis points above the official rate); transaction value (price paid); packaging vs packing (retail vs shipping); recovered material and remanufactured good (cleaned reused parts and rebuilt products); RVC (regional value content); USMCA country (U.S., Canada, Mexico).
Full Legal Text
Customs Duties, Source: USLM XML via OLRC
Legislative History
Reference
Citation
19 U.S.C. § 4531
Title 19, Customs Duties
Last Updated
Sep 23, 2026
Release point: 119-110