Preferential vs non-preferential origin
What the exam tests
Preferential and non-preferential origin are separate legal tests with different purposes. Non-preferential origin supports MFN duty, trade remedies, origin marking, quotas, statistics, and government procurement. Preferential origin supports FTA and GSP claims and requires a proof of origin plus direct-transport compliance.
Non-preferential origin
Usually based on the last substantial transformation, implemented by a change in tariff classification, an ad valorem percentage, or a specified process. There is no FTA certificate; origin is declared or determined by customs. Marking rules can differ from duty rules, so a product may be marked with one country and dutied as another.
Preferential origin
Governed by the agreement's protocol: wholly obtained, PSR, RVC, cumulation, de minimis, minimal operations, direct transport, and documentation. A valid certificate does not prove substantive origin; customs can verify the underlying rule and supplier records.
Worked example
Bicycles assembled in Country X from imported frames and wheels are shipped to Country Y. For MFN duty, Country X's national substantial-transformation test may make the bicycle X-origin. For an FTA claim, the same bicycle must satisfy the FTA PSR, for example a CTSH plus RVC 40%. If the frame is classified in the same subheading as the finished bicycle and no exception applies, the tariff shift fails even though non-preferential origin is X.
Traps
Assuming one origin result serves every purpose; treating a certificate as conclusive; using preferential PSRs for marking; forgetting direct transport and proof requirements.