Whether the certificate delivers anything is decided by these rules, not by the certificate. They sit in Announcement No. 74 and the annexes to the agreement, and the logic is not complicated — the evidence behind it is the hard part.
Direct consignment, the condition nobody reads until it bites
Where the goods transit a third country, they keep their preference only if the transit was for geographical or transport reasons, the goods did not enter trade or consumption there, nothing was done beyond unloading, reloading, splitting the consignment or keeping them in condition, and they stayed under customs control throughout. Serbia being landlocked makes this the operative clause on most Adriatic and Aegean routings.
How the value test is calculated
RVC = (ex-works price − value of non-originating materials) ÷ ex-works price × 100. The ex-works price is what is paid to the last manufacturer, including all materials, labour and other costs, with profit net of any export drawback. Non-originating material value is taken at the customs value determined under the WTO Valuation Agreement, and material of unknown origin is treated as non-originating.
De minimis: how a near miss is rescued
For goods subject to a change-in-tariff-classification rule, non-originating materials that fail that change are still disregarded where their value does not exceed 10% of the ex-works price and the other conditions are met. The tolerance applies to classification-change rules only — not to the value test and not to specific process requirements.
Sets, and the 15% line
A set classified under GIR 3 is originating where all components originate. Where it mixes originating and non-originating components, it is still originating if the non-originating components do not exceed 15% of the ex-works price of the set.
Minimal operations do not confer origin
Processing to preserve goods in transit or storage, splitting, sorting and repacking, washing, cleaning and removing paint, simple cutting and grinding, sifting, screening and grading, simple bottling, canning and boxing, affixing marks and labels, simple assembly or disassembly, slaughtering and meat cutting — alone or in combination, none of these confer origin. Knocked-down imports assembled, repacked and relabelled in China usually qualify only for a processing certificate or a re-export certificate, not for a preferential certificate.
The rules are not paperwork. The issuing office may call for the BOM, supplier invoices, the process route and the cost calculation, and may verify equipment, materials and marks on site. Declaring “wholly obtained” with nothing to show for it is the most common way a verification is lost.