Free trade agreements promise reduced or zero duty, and the promise has a condition attached: the goods have to originate in a member country under the agreement's own rule, and a part made in China does not qualify for a preference just because it ships from China. Rules of origin are the least glamorous part of an export file and the most common reason a promised duty saving does not appear on the invoice. This note covers what the rules require and what to collect.
What a rule of origin requires
Each FTA states, product by product, what makes a good originating. The common tests are wholly obtained, grown or mined in a member country, and substantial transformation, which usually means a tariff-shift rule, a change of heading or subheading at a stated level, or a regional value content threshold, a percentage of the value added within the bloc. For a plastic part, the test usually attaches to the resin and the process: a part moulded in a member country from imported resin may or may not satisfy the tariff shift, depending on the agreement and the product heading, and the answer is in the agreement's product-specific rules, not in a general principle.
| Test type | What it asks | Typical plastic case |
|---|---|---|
| Wholly obtained | Made entirely in a member country | Rare for moulded parts |
| Tariff shift | Change of heading from non-originating inputs | Resin heading to part heading |
| Regional value content | Percentage of value added in bloc | Moulding labour and overhead counted |
| Specific process | Named operation performed in bloc | Chemical reaction, extrusion rule |
Cumulation and the supply chain
Many agreements allow cumulation, which lets originating materials from member countries count toward the origin of the final good, and some extend it diagonally across agreements that share rules. This is where a plastics programme can genuinely qualify: a part moulded in one member country from resin originating in another can carry origin under cumulation even though neither step alone would satisfy the product rule. The requirement is documentation at each step, because the final claim is only as good as the upstream declarations, and a missing declaration from the resin supplier breaks the chain at the customs check.
The certificate and the claim
The preference is claimed at import with a certificate or a declaration of origin, issued by the exporter or a self-declaration on the invoice depending on the agreement, and backed by records the exporter must keep. What the buyer should collect before the first shipment is the origin declaration, the supporting cost or tariff-shift calculation where the rule is a value-content or shift test, and the resin origin declaration where cumulation is claimed. Collecting these after the goods have shipped means paying duty first and claiming later, which is possible and painful.
What buyers should ask
Three questions qualify a supplier for a preference programme. Which agreement applies to the destination market, because the same part qualifies differently under different agreements. What rule the product falls under, tariff shift or value content, and can the supplier show the calculation. And can the supplier issue the origin declaration with the records to back it, including upstream declarations where cumulation is used. A supplier who answers all three is running a preference programme; one who answers with a blank look is shipping most-favoured-nation duty.
Related reading
The HS code guide for plastic products covers the classification step the origin rule references, the export documentation guide covers the rest of the file, and the export packing note covers the physical side of the same shipment.
Related product categories
The materials and part types discussed above are grouped in our sourcing directory:
