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Guidance: Import Ban of Certain Polysilicon Products Under Proclamation 11052

22 September 2026

In plain English

CBP guidance under CSMS #69994928 explains Commerce's Temporary Final Rule imposing an import ban on certain polysilicon and polysilicon derivative products under Proclamation 11052, effective September 24, 2026.

Read the official notice
Topic
Tariffs and duties
Regulator
CBP
Published
22 September 2026
For
Imports and Exports
Where it applies
United States
Source
CBP CSMS

From the notice

The purpose of this message is to provide guidance regarding the U.S. Department of Commerce’s (Commerce’s) Temporary Final Rule (TFR) on Measures to Restrict Stockpiling of Polysilicon and Polysilicon Derivatives Under Proclamation 11052. BACKGROUND On September 24, 2026, Commerce will publish a TFR providing for procedures for an import ban on certain imports of polysilicon products. See Federal Register :: Public Inspection: Measures to Restrict Stockpiling of Polysilicon and Polysilicon Derivatives under Proclamation 11052 . The TFR was issued pursuant to Presidential Proclamation 11052 “Adjusting Imports of Polysilicon and Its Derivatives Into the United Stat
The full text is at the source

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