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CBLE teaching domain

Classification

Read the HTSUS structure and apply the GRIs, legal notes, and tariff-line logic.

Study unit 1About 8 minutes

Read the HTSUS in the right legal order

Ability objective

Use heading terms and Section or Chapter Notes before relying on a product description or search result.

Core rule

Under GRI 1, Section, Chapter, and sub-Chapter titles are for ease of reference only. Legal classification begins with the terms of the headings and any relative Section or Chapter Notes. A Note can include, define, or exclude goods and therefore can defeat an otherwise plausible heading description.

Authority and lookup route

HTSUS General Rule of Interpretation 1

Current HTSUS → General Notes → General Rules of Interpretation → GRI 1

Current legal baseline; confirm the edition designated for the exam sitting

Relevant HTSUS Section and Chapter Notes

Open the candidate Section and Chapter before reading the tariff lines

Current legal baseline; confirm the edition designated for the exam sitting

Reference lookup task

Find the sentence in GRI 1 that distinguishes titles used for reference from the legal terms that control classification.

Route: Open General Rules of Interpretation and read GRI 1 before opening a product chapter.

Worked example

A product appears to fit a heading description, but a Chapter Note expressly excludes that class of goods. Which authority controls the first classification step?

  1. 1Treat the heading as a candidate, not a final answer.
  2. 2Read the relative Section and Chapter Notes required by GRI 1.
  3. 3Apply the express exclusion before considering later GRIs.
  4. 4Move to a legally available heading rather than forcing the excluded heading.

Conclusion: The legal Note controls; the excluded heading cannot be used.

Common traps

  • ×Treating a Section or Chapter title as operative legal text.
  • ×Searching tariff descriptions without reading the Notes.
  • ×Jumping to GRI 3 before completing GRI 1 analysis.
Authority checked: 2026-08-18
Full KnowledgeRelated-category practice
Study unit 2About 9 minutes

Move through GRI 1–6 without skipping

Ability objective

Select the next applicable GRI based on why classification was not resolved at the prior step.

Core rule

The GRIs are sequential. GRI 1 starts with headings and legal Notes; GRI 2 extends heading scope to certain incomplete, unfinished, unassembled, mixed, or composite goods; GRI 3 resolves competing headings; GRI 4 covers goods most akin when the earlier rules fail; GRI 5 addresses specified containers and packing; GRI 6 repeats the legal comparison at the subheading level.

Authority and lookup route

HTSUS General Rules of Interpretation 1–6

Current HTSUS → General Notes → General Rules of Interpretation

Current legal baseline; confirm the edition designated for the exam sitting

Reference lookup task

Locate which GRI covers an incomplete article that already has the essential character of the finished article.

Route: Scan the opening clause of GRI 2(a), then compare it with the purpose of GRI 3.

Worked example

An unassembled article is imported with all components and already has the essential character of the complete article. Which rule is considered before any competing-heading analysis?

  1. 1Begin with GRI 1 and identify the complete article's candidate heading.
  2. 2Recognize the incomplete or unassembled condition described by the facts.
  3. 3Apply GRI 2(a) to determine whether the heading extends to the imported condition.
  4. 4Use GRI 3 only if competing headings remain after that extension analysis.

Conclusion: GRI 2(a) is considered before GRI 3.

Common traps

  • ×Using the first rule whose wording looks familiar instead of following sequence.
  • ×Confusing GRI 2(a) essential character with GRI 3(b) essential character.
  • ×Applying GRI 6 before deciding the heading level.
Authority checked: 2026-08-18
Full KnowledgeRelated-category practice
Study unit 3About 9 minutes

Resolve competing headings under GRI 3

Ability objective

Choose correctly among specificity, essential character, and last-in-numerical-order rules.

Core rule

GRI 3 applies when goods are prima facie classifiable under two or more headings after the earlier rules. GRI 3(a) prefers the most specific description, subject to its mixed or composite-goods limitation. GRI 3(b) uses the material or component giving essential character. Only when 3(a) and 3(b) fail does 3(c) select the heading occurring last in numerical order among those equally meriting consideration.

Authority and lookup route

HTSUS General Rule of Interpretation 3

Current HTSUS → General Rules of Interpretation → GRI 3(a), 3(b), and 3(c)

Current legal baseline; confirm the edition designated for the exam sitting

Reference lookup task

Find the condition that makes two headings equally specific for a mixed, composite, or retail-set analysis.

Route: Read the second sentence of GRI 3(a), then continue directly to 3(b).

Worked example

A retail set contains components classifiable in different headings. One component performs the set's principal function and dominates its use. Which GRI 3 step should be tested?

  1. 1Confirm that the goods qualify for GRI 3 analysis after GRIs 1 and 2.
  2. 2Recognize that headings referring to only part of a set may be equally specific under 3(a).
  3. 3Test the nature, role, value, quantity, and use of the components for essential character.
  4. 4Use 3(c) only if essential character cannot be determined.

Conclusion: Test GRI 3(b) essential character before considering GRI 3(c).

Common traps

  • ×Assuming the highest-value component always gives essential character.
  • ×Using 3(c) before attempting a supported 3(b) analysis.
  • ×Calling any group of packaged goods a retail set without checking the rule's conditions.
Authority checked: 2026-08-18
Full KnowledgeRelated-category practice
Study unit 4About 9 minutes

Move from heading to the U.S. statistical reporting number

Ability objective

Select the correct 6-, 8-, and 10-digit provision by comparing only provisions at the same hierarchical level.

Core rule

Answer first: fix the four-digit heading, then descend one level at a time. GRI 6 applies subheading terms, related subheading notes, and GRIs 1–5 mutatis mutandis, but only subheadings at the same level are comparable. The eight-digit U.S. tariff line carries the legal rate treatment; a subordinate ten-digit statistical reporting number cannot enlarge or override that legal scope. For the October 2026 CBLE, use the 2026 HTS Basic Edition even when a later current-law HTS revision exists.

Authority and lookup route

HTSUS General Rule of Interpretation 6

2026 HTS Basic → General Rules of Interpretation → GRI 6

October 28, 2026 CBLE: 2026 HTS Basic Edition. Later current-law revisions must not replace the exam-designated Basic Edition.

HTSUS General Statistical Notes 1

2026 HTS Basic → General Statistical Notes → legal tariff lines and statistical annotations

October 28, 2026 CBLE: 2026 HTS Basic Edition. Later current-law revisions must not replace the exam-designated Basic Edition.

USITC, About the Harmonized Tariff Schedule

About HTS → hierarchy of four-, six-, eight-, and ten-digit provisions

Official USITC structural guidance; exam classifications remain locked to the 2026 HTS Basic Edition.

Reference lookup task

Choose one heading, mark every first-level sibling subheading, descend through one branch, and identify whether the final two digits are legal or statistical.

Route: Read GRI 6 first, then trace indentation in the 2026 HTS Basic Edition without comparing provisions from different levels.

Worked example

In a hypothetical heading, first-level subheading A covers leather outer surfaces and B covers textile outer surfaces. Under B, B1 covers cotton and B2 covers other textiles. Where does a cotton textile article go?

  1. 1Compare A only with B and select B because the outer surface is textile.
  2. 2Enter branch B, then compare B1 only with B2 and select B1 because the material is cotton.
  3. 3Continue to the applicable eight-digit legal line before selecting its subordinate ten-digit statistical number.
  4. 4Do not compare A directly with B1 because they occupy different hierarchical levels.

Conclusion: Select B, then B1, then finish the eight- and ten-digit descent within that branch; never compare A with B1.

Common traps

  • ×Comparing provisions at different indentation levels.
  • ×Letting a ten-digit statistical description override its eight-digit legal parent.
  • ×Restarting a competing-heading GRI 3 analysis after the four-digit heading is fixed.
Authority checked: 2026-08-18
Full KnowledgeRelated-category practice
Study unit 5About 9 minutes

Classify the article before using a parts provision

Ability objective

Determine whether a specific provision, a legal note, or a parts provision controls the imported article.

Core rule

Answer first: check applicable Section and Chapter Notes, exclusions, and any specific provision for the article itself before using a parts provision. Absent special language or context, Additional U.S. Rule 1(c) covers products solely or principally used as a part, but a provision for parts or parts and accessories does not prevail over a specific provision for that part or accessory. Use the October 2026 exam's 2026 HTS Basic text; later current-law revisions require a separate live-law check.

Authority and lookup route

HTSUS Additional U.S. Rule of Interpretation 1(c)

2026 HTS Basic → Additional U.S. Rules of Interpretation → Rule 1(c)

October 28, 2026 CBLE: 2026 HTS Basic Edition. Later current-law revisions must not replace the exam-designated Basic Edition.

Applicable HTSUS Section and Chapter Notes, including Section XVI Note 2 when relevant

Open the relevant Section and Chapter Notes before the candidate parts provision

October 28, 2026 CBLE: 2026 HTS Basic Edition. Later current-law revisions must not replace the exam-designated Basic Edition.

Reference lookup task

For one machine component, find any specific heading for the component, read the applicable parts note, and only then inspect the machine's parts provision.

Route: Use the 2026 HTS Basic Edition in the order: legal notes → specific provision → parts provision → Additional U.S. Rule 1(c).

Worked example

A replacement electric motor is imported solely for a washing machine, but the HTSUS contains a specific provision for electric motors. Assume Section XVI Note 2(a) applies.

  1. 1Identify the imported article itself as an electric motor.
  2. 2Read Section XVI Note 2 before relying on the washing-machine parts provision.
  3. 3Locate the specific electric-motor provision and compare it with the generic parts language.
  4. 4Apply the rule that a parts provision does not prevail over a specific provision.

Conclusion: On the stated assumptions, classify under the specific electric-motor provision rather than automatically as a washing-machine part.

Common traps

  • ×Assuming dedicated use automatically produces a parts classification.
  • ×Ignoring a Section or Chapter Note that directs or excludes parts.
  • ×Treating a useful or compatible accessory as a part without legal support.
Authority checked: 2026-08-18
Full KnowledgeRelated-category practice