Classification diagnostic

Quick answer

What does the Classification diagnostic measure?

It drills applying the General Rules of Interpretation in the correct order, reading Section Notes, Chapter Notes, and Additional U.S. Notes as binding legal text, and placing real products in the correct heading and subheading. It is Category IV on the CBLE, worth 10 of the exam's 80 questions (about 13 percent) on the April 22, 2026 paper.

Every original question in the bank tagged Classification, in one focused run. The General Rules of Interpretation in order, Section and Chapter Notes, and worked heading-level classification calls across real product families. Instant feedback and the governing citation after each question, your progress saved on this device.

CBLE category mapping and scoring

CBLE category slot	Category IV of six
Real exam weight	10 of 80 questions on the April 22, 2026 CBLE (about 13 percent)
Questions in this diagnostic	20 original questions tagged Classification
Mode	Study mode: instant feedback and citation per question, untimed
Passing bar shown	75 percent, the CBLE's overall pass mark, applied here as a study benchmark

What this diagnostic measures. This diagnostic tests applying the General Rules of Interpretation in the correct order, reading Section Notes, Chapter Notes, and Additional U.S. Notes as binding legal text, and placing real products in the correct heading and subheading. Classification ran at 15 of 80 questions on the three CBLE papers through April 2025, then dropped to 10 of 80 starting with the October 2025 exam and held there again in April 2026, a sustained cut confirmed across two consecutive administrations rather than a one-time blip.

How scoring works. Each question scores instantly against the governing citation, and the runner tracks your percentage correct across all 20 questions in this category. The 75 percent bar shown is the real CBLE's overall passing mark, used here as a study target, not an official per-category cutoff: CBP does not publish or apply a separate pass mark for any single one of the six categories, only the overall 60-of-80 score.

How to read your result. A low score here usually traces to skipping the Notes and jumping straight from heading text to an answer, or to applying GRI 3 before confirming GRI 1 does not already resolve the question. The [classification walkthroughs](/guides/) work this exact failure mode across eleven product families.

Next steps. Read the [General Rules of Interpretation guide](/guides/general-rules-of-interpretation/) and any classification walkthrough for a product family you missed, drill lookup speed in the [chapter locator](/trainer/chapter-locator/) and [GRI order drill](/trainer/gri-order/), then retest.