Section 232 Polysilicon Tariff and ACE CATAIR Entry Type 13 Updates

Key Points

• A new federal action adjusts imports of polysilicon and its derivatives into the United States under Section 232 authority, published in the Federal Register on August 11, 2026.
• Draft ACE Cargo Release CATAIR updates covering Entry Type 13 have been posted to CBP.gov; changes are scheduled to deploy to the ACE Production environment on September 22, 2026.
• Affected CATAIR segments include SE10 (Notes 2, 7, 11, and 13) and SE15 (Note 7), all revised to reflect Entry Type 13 changes.
• An ACE Certification standard invasive maintenance window ran August 12, 2026, from 5:00 p.m. to 8:00 p.m. ET; any certification testing during that window would have been unavailable.
• CBP's notional ACE Development and Deployment Schedule has been updated and is available at CBP.gov/ACE.

On this page

1. What changed: polysilicon Section 232 action
2. What changed: ACE CATAIR Entry Type 13 updates
3. Affected filings and CATAIR segments
4. Deployment date and certification maintenance window
5. What importers, brokers, and compliance teams should do
6. Key references

Two separate but time-sensitive developments landed this week: a new Section 232 proclamation adjusting polysilicon imports, and draft ACE Cargo Release CATAIR revisions for Entry Type 13 that go live in the Production environment on September 22, 2026. The links throughout this article go directly to the primary documents, including the Federal Register notice and CBP CSMS messages themselves. Read the source.

What changed: polysilicon Section 232 action

The Federal Register published a notice on August 11, 2026 titled "Adjusting Imports of Polysilicon and Its Derivatives Into the United States." This action falls under the same Section 232 authority used for steel and aluminum tariffs. Polysilicon is a critical input for solar panels and semiconductors, meaning the affected supply chains are broad. Importers of polysilicon or downstream derivative products should immediately review the Federal Register notice to determine which HTS subheadings are covered, what duty rate applies, and whether any product-specific exclusion or TRQ mechanism is included in the proclamation.

What changed: ACE CATAIR Entry Type 13 updates

CBP posted draft revisions to the ACE Cargo Release CATAIR and Cargo Release Condition Codes documents on CBP.gov on August 11, 2026. All changes in this draft are specific to Entry Type 13. Entry Type 13 is used for Foreign Trade Zone (FTZ) admissions, so FTZ operators and brokers filing FTZ entries should pay close attention.

Affected filings and CATAIR segments

The draft revisions touch the following segments:

• SE10: Notes 2, 7, 11, and 13 updated to reflect Entry Type 13 changes.
• SE15: Note 7 updated to reflect Entry Type 13 changes.

Brokers and software developers who transmit ACE Cargo Release messages for FTZ admissions should pull the updated draft documents from CBP.gov now, compare them against current production specifications, and identify any field-level or logic changes that require system updates before the September 22 deployment.

Deployment date and certification maintenance window

CBP has scheduled the Entry Type 13 CATAIR changes for deployment to the ACE Production environment on September 22, 2026. That gives filers roughly six weeks to complete testing in the ACE Certification environment.

Be aware that a standard invasive maintenance window for ACE Certification ran on August 12, 2026, from 5:00 p.m. to 8:00 p.m. ET. Any certification testing attempted during that window would have been unavailable. If your team was affected, reschedule those test cycles promptly.

CBP has also posted an updated ACE Development and Deployment Schedule at CBP.gov/ACE. That schedule is notional and subject to change; check it regularly for any revisions to the September 22 target date.

What importers, brokers, and compliance teams should do

• Read the full Federal Register notice on polysilicon to identify the precise HTS subheadings covered, the applicable duty rate, and any exclusion or quota provisions that affect your supply chain.
• Download the draft ACE Cargo Release CATAIR and Cargo Release Condition Codes documents from CBP.gov, review all Entry Type 13 changes in SE10 and SE15, and assess whether your filing software or EDI mapping requires updates before September 22, 2026.
• Schedule ACE Certification testing for Entry Type 13 FTZ admission transactions well before September 22 and monitor the ACE Development and Deployment Schedule at CBP.gov/ACE for any date changes.

Key references

• Federal Register: Adjusting Imports of Polysilicon and Its Derivatives Into the United States (2026-16400)
• CSMS #69498185: Draft ACE Cargo Release CATAIR and Cargo Release Condition Codes for Entry Type 13
• CSMS #69495659: ACE Certification Maintenance Window, August 12, 2026
• CSMS #69494418: Updated ACE Development and Deployment Schedule