Country of Origin and Substantial Transformation for Section 301

Short answer: Country of origin can determine whether Section 301 duties apply. Importers should review production steps, component origins, manufacturing records, marking rules, and CBP ruling guidance before changing origin treatment or relying on a new sourcing structure.

What origin review checks

• Where key components are made.
• What processing occurs in each country.
• Whether processing changes name, character, or use where relevant.
• Whether marking rules apply.
• Whether a CBP ruling should be considered.

Why it affects Section 301

Section 301 duties generally turn on China-origin status and the relevant tariff action. If origin facts are wrong or incomplete, tariff exposure may be overstated or understated.

Documentation to keep

Keep bills of materials, production flow charts, supplier certifications, factory records, product specs, and ruling research tied to the origin conclusion.

How Sorini Strategic Advisors helps

Sorini Strategic Advisors helps importers review tariff exposure, customs compliance, HTS classification, Section 301 duty treatment, and import duty recovery opportunities.

FAQ

Can sourcing changes reduce Section 301 duties?

They can affect duty exposure only when the origin analysis supports the changed treatment.

Is a supplier statement enough?

Usually no. It should be backed by production facts and records.

Related resources

• Country of Origin Review for Importers
• Binding Ruling for HTS Classification or Origin
• Tariff Engineering and Product Design Review
• Section 301 China Tariff Relief Guide for Importers

Official sources used

CBP Rulings and Legal Decisions, CBP Customs Rulings Online Search System, eCFR 19 CFR Part 134, USTR China Section 301 tariff actions and exclusion process, CBP Reasonable Care

Contact Sorini Strategic Advisors for a tariff review.