U.S. BIS restricts stockpiling of polysilicon (solar) imports before Section 232 measures take effect
Section 232 minimum import prices and tariffs take effect December 4, 2026.
The U.S. Department of Commerce’s Bureau of Industry and Security (BIS) today released a temporary final rule implementing measures under Proclamation 11052 to restrict stockpiling of polysilicon (solar) and polysilicon derivative products before new Section 232 minimum import prices and tariffs take effect December 4, 2026. The rule is effective from September 22 through December 3, 2026.
Commerce will monitor existing importers of record (IORs) and may prohibit further entries before December 4, 2026, when import volumes are substantially greater than historical averages. Among other factors, Commerce will consider import volumes since August 6, 2026, average weekly volumes during 2025 and specified periods in 2026, and the use of affiliates or new IORs.
New IORs registered with U.S. Customs and Border Protection (CBP) on or after August 6, 2026, generally may not exceed specified weekly limits without Commerce approval. Commerce and CBP may take action against importers and customs brokers that use multiple IORs or other arrangements to circumvent the restrictions.
Companies subject to a prohibition or restriction may apply to Commerce for a waiver. Commerce intends to respond to applications within 14 days of receipt.