Every technique in this guide reduces to one habit: for each answer, name the rule, the note, and the supporting document. The readiness checks in the final section work as a pre-exam checklist. Administrative matters — eligibility, registration windows, and official subject lists — should be confirmed directly with the Ministry of Examination (www.moex.gov.tw), which administers this credential.
Applying the General Rules of Interpretation in order, not by instinct
Classification answers come from working the General Rules of Interpretation sequentially. Begin with the heading text and the section and chapter notes; only reach the later rules when two or more headings each plausibly cover the goods.
Start every classification with GRI 1: the terms of the heading and any section or chapter notes are legally decisive before anything else is considered. A chapter note can exclude a product the heading text seems to include, and a note can define a term differently from everyday usage. Train yourself to write down the heading and the note you relied on. If the answer needs no interpretive leap, the later rules never enter the analysis at all.
Worked scenario: an importer brings in a countertop machine that both grinds coffee beans and steams milk, and it appears under two headings. The common mistake is arguing essential character by weight — 'the grinder motor is heavier, so it is a grinder.' The better decision is to compare the two headings first: if one describes the machine more specifically, that heading wins under the specificity rule without any character analysis. Only when the headings are equally specific does essential character arise, judged by the machine's role, not its mass. This matters because citing the wrong rule step often drives you to the wrong heading even when your instinct about the product was correct.
- GRI 3(a): compare the headings; the most specific description prevails over a general one.
- GRI 3(b): for composite or mixed goods, classify by essential character when specificity does not settle it.
- GRI 3(c): if the goods remain equally classifiable, take the last heading in numerical order.
Transaction value: when royalties, assists, and conditions belong in the price
Transaction value is the price actually paid or payable for the exported goods, adjusted for listed additions such as assists, royalties paid as a condition of sale, and resale proceeds returning to the seller, provided the price meets acceptability conditions.
The method rests on a sale for export to the importing country and a price customs can accept. Acceptability checks whether the buyer–seller relationship affected the price and whether restrictions or conditions tied to the sale make it unusable. Additions then build the price upward: materials and tools supplied free or cheaply by the buyer, royalties the buyer is required to pay as a condition of sale, packaging and assists, and proceeds of any resale that flow back to the seller.
Worked scenario: an importer buys branded machines and separately pays a 3 percent royalty to a foreign trademark owner; the purchase contract makes the license a condition of the sale. A plausible mistake is excluding the royalty because it is paid to a third party rather than to the seller. The better decision is to add it: the test asks whether the royalty is required as a condition of the sale of the imported goods, not who receives the money. Getting this wrong understates the customs value of every entry in the series, so the error repeats until someone catches it.
Deductive value versus computed value: two formulas that blur under pressure
Deductive value works backward from the unit resale price in the importing country, subtracting commissions, profit, and post-import costs. Computed value builds forward from materials, fabrication, profit, and transport. Their directions of travel are opposite.
When transaction value cannot be used, the fallback methods run in a fixed order: transaction value of identical goods, then similar goods, then deductive and computed value, then a flexible fallback consistent with the whole framework. Under the WTO valuation framework, which Taiwan's system follows, importers may request that the deductive and computed steps swap places. Confusing the two methods midway is preventable: deductive starts from a domestic resale price and subtracts; computed starts from production facts and adds.
Practice example, simplified for learning: goods resell in the importing country at 100 per unit. Deductive value subtracts commission 10, general profit 15, and post-import transport 5, giving 70. Computed value instead starts from materials 40, plus fabrication 20, plus profit 15, plus transport to the port 5, giving 80. Same goods, different anchors — resale price versus production cost. A useful self-check: if your two answers come out identical, or you added when you meant to subtract, you have mixed the formulas.
| Method | Core question | Typical use point |
|---|---|---|
| Transaction value | Can the actual export price be accepted? | Default method whenever a clean sale exists |
| Identical goods | What was paid for the same goods, same origin? | Price unusable; identical transactions exist at about the same time |
| Similar goods | What was paid for commercially interchangeable goods? | No identical transactions are available |
| Deductive value | What remains after subtracting from the domestic resale price? | Goods are resold in the importing country in the same state |
| Computed value | What do production cost, profit, and transport add up to? | Production data are available from the producer |
| Fallback | What reasonable means fit the available data? | No earlier method can be applied without arbitrariness |
Preferential origin is a legal test, not the shipping label
Non-preferential origin generally asks where goods were wholly obtained or last substantially transformed. Preferential origin additionally requires meeting the specific agreement's rule — tariff shift, value content, or processing — and holding the required proof.
Wholly obtained covers goods entirely produced in one place: minerals extracted, plants grown, animals raised there. Everything else turns on substantial transformation, often judged by whether processing produced a new tariff heading, but the exact test is fixed by each legal regime. Preferential origin adds a second layer: the goods must satisfy the rule written into the particular agreement, and the importer must hold the certificate or declaration that agreement requires. One product, two different legal questions.
Mini scenario: components from country A are assembled and packed in country B, and the invoice shows country B. The broker claims preference and the claim fails, because the assembly did not satisfy the agreement's change-of-heading rule. The better decision is a two-step test before any claim: does the production in country B meet this agreement's rule of origin, and can the client actually produce the required proof document? A shipping label or a place of assembly substitutes for neither step, which is why the two questions must be answered in that order.
Declaration tracing: match every field to the document that proves it
Each declaration field traces to a source document: the invoice supports value and terms, packing documents support quantities, licenses and certificates justify controlled or preferential lines, and transport documents anchor the movement. Practice the trace explicitly.
Build the habit on paper: take one entry-style practice question and annotate every declared element — description, quantity, value, origin, and any license reference — with the document that proves it. Where two documents disagree, the disagreement is the finding: an invoice weight of 480 kilograms against a packing list of 408, or a license covering a narrower description than the goods declared. Reviewers who can name the supporting document spot these conflicts quickly; those who cannot, skim past them.
Exercise with a self-check rubric: pull five classification and entry questions from past papers. For each, write the heading you chose, the rule you applied, the section or chapter note you checked, and the document that would support each declared fact. Re-read your notes a day later and score them against this rubric before checking any model answer.
- You cited a rule, not just a heading number.
- You named the note you checked, even when it did not change the answer.
- Every declared fact has a named supporting document or a written 'missing'.
- Items marked 'missing' were followed up in writing, not left blank.
Restricted goods: the broker verifies the list before the declaration
Prohibited goods cannot be imported or exported at all; restricted goods move only with the permit the competent agency requires. The professional habit is checking the current import and export control lists for each new commodity rather than trusting familiarity.
Sort controlled trade into three working categories: absolute prohibitions, restrictions requiring a permit or license from another agency, and goods that need inspection, quarantine, or certification before release. The lists and the responsible agencies are published and periodically revised, so a commodity's status can change between one engagement and the next. The broker's job is lookup and confirmation — identifying which agency, which document, and whether the client already holds it.
Paper scenario: a client wants to import a plant-derived product. The mistaken path is declaring first and treating the certificate as paperwork to chase later. The better decision is to confirm the product's status on the current control list, identify that a quarantine certificate is required, and tell the client the entry cannot be lodged properly without it. On paper, the observable difference is sequencing: verification appears before the declaration, and any missing permit is raised with the client as a condition of filing, not as a problem discovered afterward.
Broker responsibility: what your signature commits you to
A broker's declaration commits the brokerage to accuracy and lawful conduct. Frame the duties as decision rules: verify before you sign, refuse false documents, correct discovered errors promptly, and keep records that can reconstruct every entry you lodge.
Treat ethics questions as decisions with two branches. Genuine doubt — the facts support more than one classification or valuation — calls for research and a reasoned choice you can explain. Misdescription — a client asks you to declare spare parts as accessories to reduce duty, or to invoice under another party's name — calls for refusal, a short written explanation, and a record of what you declined. The line between the branches is the study point: doubt is resolved with rules and documents, pressure is resolved by declining.
A preparation sequence you can adapt: first, build one map connecting the six subject areas — for example, how a royalty fact feeds the customs value, which feeds the origin claim, which feeds a declaration field. Second, spend most sessions re-deciding worked cases and writing the rule behind each answer. Third, close with mixed question sets under time pressure and log errors by concept rather than by question. Readiness checks below; registration and administrative details are published by the Ministry of Examination.
- You can state, in one sentence, the GRI rule you applied for any practice classification.
- You can recompute a deductive value and a computed value without checking the formulas.
- You can explain whether a given royalty is added to value, and why, in under thirty seconds.
- You can name the proof a preferential claim needs for a given agreement scenario.
- You can trace every declaration field in a past question to a source document or flag it as missing.
References and further reading
Use these references to explore the concepts and check the latest information from the relevant organizations.