Customs Law, Regulations, and Procedures
This domain tests whether you can trace a customs obligation to its legal source and route a client's dispute through the correct procedural channel on time. Expect questions that pair a fact pattern with a deadline, a citation, or a question about which authority controls.
The hierarchy of authority
- Statute - 19 U.S.C. supplies the operative commands: §1484 (entry), §1500 (appraisement), §1514 (protests), §1592 (penalties).
- Regulation - 19 C.F.R. fills in mechanics: Part 111 (brokers), Parts 141–143 (entry and summary), Part 134 (marking), Part 174 (protests).
- Guidance - Federal Register notices, CSMS messages, Informed Compliance publications, and CBP rulings (HQ and NY series). A ruling binds CBP only for the named transaction; the Explanatory Notes persuade but do not bind.
The dispute clock
Liquidation starts the clock. A protest under 19 U.S.C. §1514 must be filed within 180 days of liquidation. An Application for Further Review rides along with the protest and does not extend that date. If CBP does not act within 30 days the protest is deemed denied (19 U.S.C. §1515), and a summons must be filed at the Court of International Trade within 180 days of denial.
Worked example
An entry liquidates November 14. A protest filed May 8 is timely: November 14 plus 180 days lands on May 13 of the following year. If the same protest were filed May 20, CBP must deny it as untimely and the CIT has no jurisdiction - even if the classification argument is excellent. Merits never rescue a missed deadline.
Traps that cost marks
- Counting 180 days from the entry date rather than the liquidation date.
- Treating an AFR as a tolling event.
- Quoting a CBP ruling as if it bound the importer.