Data / Federal rules / 2026-19537
Measures To Restrict Stockpiling of Polysilicon and Polysilicon Derivatives Under Proclamation 11052
The Industry and Security Bureau published this final rule in the Federal Register on September 24, 2026. It took effect on September 22, 2026.
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What the agency says
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 temporary final rule (TFR), announces the criteria and process it will use to monitor existing companies for evidence of stockpiling, limit a newly established importer's ability to stockpile, and subject companies that are stockpiling to an import prohibition if necessary. This TFR also establishes the process for such companies to obtain a waiver from any import prohibitions imposed pursuant to this rule, and imposes certain import limitations on new importers that register with U.S. Customs and Border Protection (CBP) on or after August 6, 2026.
Key facts
- Document number
- 2026-19537
- Type
- Final rule
- Action
- Temporary final rule
- Agency
- Commerce Department; Industry and Security Bureau
- Published
- September 24, 2026
- Takes effect
- September 22, 2026
- Dates
- This rule is effective September 22, 2026, through December 3, 2026.
- Docket
- Docket No. 260915-0004
- Regulation ID (RIN)
- 0694-AK57
- Code of Federal Regulations
- 15 CFR 705
- Topics
- Administrative practice and procedure; Business and industry; Classified information; Confidential business information; Imports; Investigations; National defense
- Pages
- 6
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Everything from the Industry and Security Bureau · Rules on administrative practice and procedure · Rules on business and industry · Rules on classified information · Published in September 2026
Read from the Federal Register API, last updated 2026-10-24. The document on federalregister.gov is the official record; dates and dockets can change through later corrections. Free to reuse with credit to SpecStream under CC BY 4.0.