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Tariffs and dutiesCommerce BISUnited StatesExports

Measures To Restrict Stockpiling of Polysilicon and Polysilicon Derivatives Under Proclamation 11052

24 September 2026

In plain English

Under Proclamation 11052, BIS may restrict a company's imports of polysilicon and polysilicon derivatives if found stockpiling ahead of import adjustments taking effect December 4, 2026.

Read the official notice
Topic
Tariffs and duties
Regulator
Commerce BIS
Published
24 September 2026
For
Exports
Where it applies
United States
Source
BIS (Bureau of Industry and Security)

From the notice

On August 6, 2026, the President issued Proclamation 11052, "Adjusting Imports of Polysilicon and Its Derivatives Into the United States" (Proclamation 11052), ordering the Secretary of Commerce (Secretary) to take action to restrict imports by a company if he determines the company is stockpiling polysilicon or polysilicon derivatives (Polysilicon Products) in advance of import adjustments that will be effective on December 4, 2026. The Bureau of Industry and Security (BIS), in this temporar
The full text is at the source

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