CSMS & Rulings
Every CBP bulletin and CROSS ruling, indexed and searchable. No account required.
Last updated Aug 16, 2026
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CSMSCSMS 69357309 · Jul 27, 2026 · 301, PGA
Harmonized System Update (HSU) 2617
CBP announces Harmonized System Update (HSU) 2617, containing tariff and ABI record updates including Section 301 Forced Labor HTS changes and revised U.S. Fish and Wildlife Service PGA flagging.
CSMSCSMS 69326983 · Jul 23, 2026 · 301
GUIDANCE: Section 301 Forced Labor Import Duties
CBP issued guidance implementing USTR-announced Section 301 tariffs of 10-12.5% on imports from sixty economies, effective July 24, 2026, with instructions for importers and filers on entry submission.
CSMSCSMS 69324417 · Jul 23, 2026 · 301, PGA
Harmonized System Update (HSU) 2616
CBP announces Harmonized System Update (HSU) 2616, published July 21, 2026, containing tariff and ABI record updates including PGA HTS flagging changes and Section 301 Brazil-related HTS updates effective July 22, 2026.
CSMSCSMS 69302472 · Jul 21, 2026 · 301
GUIDANCE: Section 301 Duties on Certain Products from Brazil
CBP provides guidance on new Section 301 tariffs imposing a 25% additional ad valorem duty on most products of Brazil effective July 22, 2026, detailing exemption categories, entry filing sequencing, foreign trade zone status, and Chapter 98 treatment.
CSMSCSMS 68439049 · Apr 23, 2026 · 301, ACE ops
Harmonized System Update (HSU) 2608
CBP announces Harmonized System Update (HSU) 2608, published April 22, 2026, containing 39 Harmonized Tariff Records and 123 ABI records, including Section 301 Large Civil Aircraft HTS updates and miscellaneous adjustments from the 2026 HTS verification process.
CSMSCSMS 67032615 · Dec 8, 2025 · 301, PGA, other
Harmonized System Update (HSU) 2542
CBP announced Harmonized System Update (HSU) 2542, published December 4, 2025, containing tariff and ABI record updates related to the U.S.-Korea Strategic Trade and Investment Deal, Section 301 product exclusion extensions, and an FDA-related HTS flagging change.
CSMSCSMS 66494339 · Oct 10, 2025 · 301
UPDATE: Section 301 Vessel Fees
CBP updates guidance on Section 301 vessel fees applicable to vessels owned, operated, or built in China and foreign-built vehicle carriers, per FRN annexes, with LNG tankers exempt and payment burden on vessel operators.
CSMSCSMS 66427144 · Oct 3, 2025 · 301
Section 301 Vessel Fees
CBP provides guidance on new Section 301 vessel fees applicable to vessels owned, operated, or built in China and to foreign-built vehicle carrier vessels, noting that operators bear responsibility for determining fee liability.
CSMSCSMS 66200760 · Sep 11, 2025 · AD/CVD, 232, 301, IEEPA, ACE ops
Updated Guidance: Resubmission Timeframe for Rejected Entry Summaries with Trade Remedy Duties
CBP clarifies the resubmission timeframe for rejected entry summaries involving AD/CVD and trade remedy duties (IEEPA, Section 232, Section 301, and Section 201), noting rejection time limits of 60 or 300 days and a 10-working-day trade response window.
CSMSCSMS 66077997 · Aug 29, 2025 · 301
GUIDANCE: Extension of Section 301 China Product Exclusions
CBP provides guidance that USTR extended certain Section 301 China product-specific and manufacturing equipment exclusions through November 29, 2025, and explains how to file HTSUS 9903.88.69/9903.88.70 to claim them.
CSMSCSMS 66075832 · Aug 29, 2025 · 301, PGA
Harmonized System Update (HSU) 2534
CBP announces Harmonized System Update (HSU) 2534, published August 29, 2025, containing 717 tariff records and 3364 ABI records, which includes a Section 301 product exclusion extension and PGA HTS flagging updates for EPA.
CSMSCSMS 65236574 · Jun 3, 2025 · 232, IEEPA, 301, AD/CVD
UPDATED GUIDANCE – Proclamation “Adjusting Imports of Aluminum and Steel in the United States,” Amending Executive Order 14289, “Addressing Certain Tariffs on Imported Articles”
CBP issued updated guidance on tariff stacking priority order under EO 14289 as amended, clarifying how Section 232 auto/aluminum/steel and IEEPA Canada/Mexico tariffs interact, reporting requirements, effective dates, and refund procedures for overlapping duty payments.
CSMSCSMS 65223125 · Jun 2, 2025 · 301, PGA
Harmonized System Update (HSU) 2520
CBP announces Harmonized System Update (HSU) 2520, published May 31, 2025, containing tariff and ABI record changes, including extension of certain Section 301 exclusions through August 31, 2025, and a PGA-related FDA flag update.
CSMSCSMS 65054270 · May 15, 2025 · 232, IEEPA, 301, AD/CVD
UPDATED GUIDANCE – Executive Order 14289 Addressing Certain Tariffs on Imported Articles
CBP provides updated guidance implementing Executive Order 14289, establishing a prioritization order for applying Section 232 auto, IEEPA Canada/Mexico, and Section 232 steel/aluminum tariffs when multiple actions could apply to the same article, along with reporting instructions and refund procedures for entries since March 4, 2025.
CSMSCSMS 64705939 · Apr 10, 2025 · ACE ops, 301
RESOLVED: Error F624 EST DUTY/CALC'D DUTY MISMATCH – LINE; 99038191 & 99038508 With SPI C or JP Rejecting in Error
CBP announced that a system error (F624) causing incorrect rejection of entry summary lines with certain SPI codes and HTS provisions has been resolved, and instructed filers to resubmit affected entry summaries.
CSMSCSMS 64018403 · Feb 6, 2025 · 301, 232, IEEPA, ACE ops
Updated - Entry Summary Order of Reporting For Multiple Harmonized Tariff System (HTS) in ACE
CBP updated the required order of reporting for multiple HTS classifications on a single entry summary line in ACE when Chapter 98 or 99 codes are involved, including sequencing for Section 301, IEEPA (China/Hong Kong), and Section 232/201 duties or quotas. This update supersedes prior guidance to incorporate reporting instructions tied to the February 1, 2025 IEEPA executive order.
CSMSCSMS 63789491 · Jan 17, 2025 · 301, 232, other
CBP Proposes New Rule to Strengthen Enforcement and Limit Duty Exemption for Low-Value Shipments
CBP announced a proposed rule that would remove the duty-free de minimis exemption for low-value shipments subject to Section 201, 232, and 301 actions, and would require 10-digit HTSUS classification for certain low-value shipment claims; a 60-day public comment period applies.
CSMSCSMS 63724433 · Jan 13, 2025 · ACE ops, 301
Resolved - Error 771 and 613 incorrectly triggering for HTS 85423100, 85412900, 85412100, and 85411000
CBP announced that the issue causing Errors 771 and 613 to incorrectly trigger for certain HTS summaries paired with allowable Section 301 trade remedy combinations has been resolved, and filers should resubmit any summaries that previously failed due to this issue.
CSMSCSMS 63663302 · Jan 8, 2025 · ACE ops, 301
Error 771 and 613 incorrectly triggering for HTS 85423100, 85412900, 85412100, and 85411000
CBP notes that certain HTS numbers are incorrectly triggering Error 771 and Error 613 when paired with valid Section 301 trade remedy HTS combinations, and states a fix is anticipated by January 11 with a follow-up CSMS to be issued once resolved.
CSMSCSMS 63577329 · Dec 31, 2024 · 301
GUIDANCE: Section 301 China Tariffs Four Year Review Increasing Additional Tariffs on Certain Imported Products
CBP provides guidance on Section 301 China Four-Year Review tariff increases effective January 1, 2025, raising additional duty rates on certain tungsten products, wafers, and polysilicon, along with entry filing instructions and foreign trade zone treatment.