Rules of Origin

Rules of origin (RoO) are the legal tests that decide where a good is deemed to "come from" for trade-policy purposes. Because modern supply chains cross many borders, a smartphone assembled in Vietnam may contain Korean chips, Japanese sensors, and Chinese casings — RoO determine which country's tariff rate, quota, or preferential treatment applies at the importing border.

There are two broad categories:

• Non-preferential rules, used for most-favoured-nation tariffs, anti-dumping duties, country-of-origin labelling, and trade statistics. The WTO's Agreement on Rules of Origin (1994) commits members to harmonising these, though the work programme remains incomplete.
• Preferential rules, embedded in free trade agreements (FTAs) and unilateral schemes like the EU's Generalised Scheme of Preferences, which decide whether goods qualify for reduced or zero duties.

Common tests include:

1. Wholly obtained — goods entirely produced in one country (e.g., minerals, agricultural products).
2. Substantial transformation, typically measured by a change in tariff classification (CTC) at the HS heading or subheading level.
3. Regional value content (RVC) — a minimum percentage of value added locally, sometimes calculated by build-up or build-down methods.
4. Specific processing rules, such as the "yarn-forward" rule in USMCA textiles, requiring fibre, yarn, and fabric to originate within the bloc.

RoO matter politically because they shape industrial policy. The 2018 USMCA renegotiation raised the auto RVC threshold from NAFTA's 62.5% to 75% and added a labour-value-content requirement tied to wages above US$16/hour, explicitly aimed at reshoring production. Critics argue stringent RoO function as disguised protectionism and impose heavy compliance costs on small exporters, while proponents see them as essential to prevent trade deflection — third countries routing goods through FTA partners to capture preferences they did not negotiate.