Check Section 301 when Chinese inputs are processed in Mexico

A shipment from a Mexican plant can require a China-origin analysis for Section 301. Establish the goods’ production facts, then check the tariff provision and relevant dates. The country of dispatch and a Mexican invoice cannot by themselves answer both steps.

Separate the factory review from the tariff review

For a motor assembled from imported subassemblies, ask what arrives functional and which operations the Mexican plant performs. For more extensive production, collect the process steps, material sources and intermediate outputs. Have the applicable origin analysis reviewed for the Section 301 question. A result reached for marking or preference has its own legal purpose.

The origin-purpose guide supplies the fact packet. The USMCA reference preserves historical cases where the legal questions produced different answers.

Save a dated tariff check

USTR’s product search uses an eight-digit HTS subheading to locate actions. Read the underlying action and the HTS instructions for the entry. A match in that search alone does not establish whether a product-specific exclusion applies.

An exclusion needs the description and the date

If the tariff line is within a published exclusion’s heading, compare the merchandise with the exclusion’s full product description. Record who checked dimensions, composition, use or other qualifying characteristics. Then confirm the effective period and any entry or withdrawal conditions stated in the notice.

A PO date, departure date and US entry date are different events. Ask the broker which date the applicable provision uses. Keep the notice in the file with the reviewed specifications and the filing instruction. Recheck an extension or amendment before relying on a prior shipment’s treatment. USTR actions and exclusion notices

Keep the Mexico-side decision in its own file

Chinese materials entering Mexico may raise Mexican duty, registration, IMMEX and record-control questions before a finished good ever reaches the US. Use the China-to-IMMEX guide for that inbound handoff. This Section 301 page addresses the subsequent US measure review.

Other US measures can operate alongside Section 301. Check any relevant AD/CVD order and other applicable restrictions with the responsible trade team. This guide quotes no current duty rate and calculates no total landed tax.

Before the next shipment

Retain a review date, rule version and owner for each open question. Reopen the file when the plant changes an input source, the process changes, the classification changes or a notice alters the effective period. Escalate disputed origin or exclusion facts to the importer’s broker or qualified customs counsel with the evidence attached.