CSMS #68439049 · Harmonized System Update (HSU) 2608
Brief takeaway: CBP has issued a Harmonized System Update that loads Section 301 Large Civil Aircraft tariff changes and other 2026 HTS corrections into the entry filing system.
What changed: According to the notice, Harmonized System Update (HSU) 2608 was created on April 22, 2026, and contains 39 Harmonized Tariff Records and 123 ABI records. The notice states this update includes Section 301 Large Civil Aircraft (LCA) HTS updates per 86 FR 36313, along with miscellaneous HTS adjustments required by verification of the 2026 Harmonized Tariff Schedule.
Who's affected: The notice cites Section 301 Large Civil Aircraft (LCA) measures and references CSMS 49153305 for guidance. Specific HTS chapters, codes, and countries of origin are not otherwise named in this notice; importers of goods potentially subject to the Section 301 LCA action may find it relevant.
What to review:
- Review whether any of your products fall within the Section 301 LCA scope referenced in 86 FR 36313 and CSMS 49153305.
- Confirm with your customs broker that your entry software reflects the updated 39 tariff records and 123 ABI records.
- Check whether the miscellaneous 2026 HTS verification adjustments touch classifications you use.
- Confirm effective dates and any reporting requirements before filing affected entries.
This is general information, not legal advice and not a compliance determination — confirm specifics with a licensed customs broker or trade counsel.
Official notice
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This update is a general educational summary based on public CBP CSMS / Federal Register information. It is not legal advice, customs broker advice, a final classification, duty determination, entry instruction, or compliance determination. Importers should confirm applicability, effective dates, HTSUS/Chapter 99 reporting, rates, refunds, PSC procedures, and filing instructions with their licensed customs broker, trade counsel, and/or CBP.