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The exam is open-book. You lose it on lookup speed.
The U.S. Customs Broker License Examination (CBLE) is open-book across roughly 6,500 pages of the Harmonized Tariff Schedule of the United States (HTSUS) and Title 19 of the Code of Federal Regulations (19 CFR). Knowing the answer is not enough: you have to find the exact citation in time. Customs Broker Sim gives you timed navigation drills that score how fast and how accurately you land on the right chapter, heading, and section, and links you out to the official text to confirm. No login, no wall.
Scope: the United States CBLE, administered by U.S. Customs and Border Protection (CBP) twice a year, in April and October. We are independent and not affiliated with CBP, we do not administer the exam or issue licenses, and this is a navigation and speed trainer plus original practice questions, not a copy of the tariff or the regulations, and not a substitute for reading the official texts on hts.usitc.gov and the eCFR.
Recent pass rate
of candidates, recent sittings
Format
multiple choice, timed
Pages you must navigate
HTSUS + 19 CFR combined
Cost to use this
every tool free and ungated
Exam facts last checked against CBP on . Every figure carries the date it was verified.
Your lookup-speed console
sample readout · illustrative dataThe trainer times every drill from the moment the task appears to the moment you land on the correct citation, then breaks your median lookup time down by task type, the same kinds of lookups the CBLE tests. The gauge reads your median seconds per lookup against the 45-to-90-second band the strongest candidates hold. The numbers below are illustrative sample data, shown to explain the readout, not a measurement of any real candidate.
Median lookup
Land inside 45 to 90 seconds and you finish the paper with time to check. Above two minutes per lookup and the clock beats you before the questions do.
The short answer
quotableWhy do people fail an open-book exam?
Because the CBLE is a timed lookup test, not a memory test. It is open-book across roughly 6,500 pages of the HTSUS and 19 CFR, and recent sittings have passed only about 15 to 25 percent of candidates. Most who fail did not lack knowledge: they ran out of time hunting for the governing citation. The fix is drilling navigation until any common lookup lands in under 90 seconds.
A drill is a citation-shaped task, on the clock
worked, not multiple guessTask: classify a stainless-steel vacuum flask, 0.75 L, for hot beverages. Find its HTSUS heading.
The clock starts. You navigate the tariff by structure, not by keyword: the flask is not classified by its steel (Chapter 73) but as a vacuum vessel under General Rule of Interpretation (GRI) 1, which sends you to a specific heading. The trainer scores the seconds to the correct citation and shows the path a fast candidate takes.
How the lookup trainer works
speed and accuracy, both scoredGet a citation task
The trainer poses a fresh exam-style lookup: classify an item, find a duty rate, or locate the 19 CFR section that governs a procedure. A timer starts the instant the task appears.
Navigate the structure
Drill down the real hierarchy: section, chapter, heading, subheading, or CFR part and section. No keyword search, because the exam books have no search box either. You commit to a citation.
Read the speed coach
See your elapsed time against the 90-second target, the fast path you should have taken, and a link out to hts.usitc.gov or the eCFR to confirm the live text. Your slowest task type is flagged to drill next.
The corpus, mapped
where each question livesThe exam draws from two public-domain government works. Knowing where each topic lives is half the speed. This is the map the trainer drills into muscle memory: every row links out to the official text so you confirm against the source, never a copy of it.
| Citation | Corpus | Governs | Why it costs candidates time |
|---|---|---|---|
| 19 CFR 111 | 19 CFR | Customs broker licensing, conduct, and recordkeeping | The "rules about brokers themselves" part. Compliance questions live here, and candidates waste time hunting Part 111 vs Part 163 recordkeeping. |
| 19 CFR 141 to 143 | 19 CFR | Entry of merchandise, entry summary, special procedures | The single densest Entry and Entry Summary cluster. Knowing 141 (entry) from 142 (release) from 143 (special) saves a lookup per question. |
| 19 CFR 152 | 19 CFR | Classification and appraisement (valuation) of merchandise | Transaction value, deductive, computed. Valuation is a whole exam category and the method hierarchy is a frequent trap. |
| 19 CFR 190 | 19 CFR | Modernized drawback (refund of duties on re-export) | Modernized drawback moved from Part 191 to Part 190. Old study guides still point at 191, sending candidates to the wrong Part under the clock. |
| HTSUS GRI 1 to 6 | HTSUS | General Rules of Interpretation: how any good is classified | The six rules apply in strict order. Classification questions are unwinnable if you reach for GRI 3 before ruling out GRI 1, and the order is where people slip. |
| HTSUS §XI | HTSUS | Textiles and apparel, Chapters 50 to 63 | A classic classification battleground: knit vs woven, chief-weight rules, and Section Notes that override the obvious heading. High time-sink per question. |
| HTSUS Ch. 98 | HTSUS | Special classification provisions (US goods returned, repairs) | Easy to forget it exists. A question that looks like a normal classification is really a Chapter 98 provision, and missing it is a guaranteed wrong answer. |
| HTSUS Gen. Notes | HTSUS | Duty rates, country of origin, free-trade program eligibility | General Note 3 (rate columns) and the trade-agreement notes decide the duty owed. Candidates classify correctly, then lose the point on the wrong rate column. |
Structure compiled from the public HTSUS (hts.usitc.gov) and Title 19 CFR (ecfr.gov). Original commentary, provenance recorded per row. The corpus text itself is never republished here. Last checked 2026-07-22.
Every tool, free and ungated
no signup, no wallHTSUS & 19 CFR lookup trainer
Timed citation drills that score how fast and accurately you navigate the tariff and the regulations to the right chapter, heading, and section. The surface no MCQ bank ships, because speed, not recall, is what the open-book exam tests.
GuideWhy the CBLE is a speed exam
How an open-book exam still fails most who sit it, the timing math, and the tabbing-and-drilling routine that turns 6-minute hunts into 60-second lookups.
GuideThe HTSUS, mapped
How the tariff is built: sections, chapters, headings and subheadings, and the section and chapter notes that decide classification before you ever read a heading.
ReferenceReading 19 CFR fast
The parts a broker candidate hits most (entry, valuation, drawback, bonds) and how to tab them so a procedure question resolves to a part and section in seconds.
PracticeOriginal CBLE question bank
Multiple-choice questions written from the public exam blueprint and the underlying public law, each keyed to the exact citation you should be able to find. Instant scoring, per-question explanations.
FreshnessEvery exam fact is dated
The CBLE runs twice a year, in April and October. Every exam fact here is checked against the official CBP notice, with the verification date shown on each page. We never promise a cadence we do not keep.