Polysilicon stockpiling TFR: waivers, new-IOR weekly caps, and broker diligence
Beyond the flag-and-ban headline: how Commerce monitors existing IORs, the exact weekly quantity caps for new IORs registered on or after August 6, 2026, the waiver package, and what brokers must diligence before they transmit.
The polysilicon stockpile Temporary Final Rule is more than a Commerce-to-CBP flag that locks consumption entries. FR Doc. 2026-19537 (91 FR 60505) sets monitoring factors for existing Importers of Record, hard weekly quantity caps for new IORs registered on or after August 6, 2026, a waiver application path, and explicit broker diligence expectations with license-penalty risk.
Effective window: September 22, 2026 through December 3, 2026. The underlying Proclamation 11052 MIPs and tariffs take effect December 4, 2026. This article is the TFR's mechanics layer; the companion CSMS #69994928 piece covers the flag-and-warehouse operational headline.
New IORs registered on or after August 6, 2026 face weekly caps by HTS. Breach the cap without a waiver and Commerce can lock further entries until December 4.
Monitoring factors for existing IORs
Commerce monitors Polysilicon Products to find stockpiling ahead of December 4. When it determines an IOR is importing in volumes substantially greater than historic averages, it gives CBP written notice. CBP notifies the IOR and any brokers conducting business for that IOR. Those IORs are then prohibited from further Polysilicon Product entries before December 4, subject to waiver.
The TFR's non-exclusive monitoring factors include:
- Aggregate volume of Polysilicon Products imported since Proclamation 11052 (August 6, 2026)
- Weekly average volume since August 6, 2026
- Weekly average volume between January 1, 2026 and August 6, 2026
- Weekly average volume imported in 2025
- Use of affiliates that do not customarily import Polysilicon Products, or use of new IORs to import them
New-IOR weekly quantity caps
Absent Commerce approval under the waiver process, new IORs that registered with CBP on or after August 6, 2026 may not import Polysilicon Products before December 4 in weekly volumes greater than:
3818.00.0020 / 0040 / 0045 / 0050 / 0091 → 7 kg / week
HTSUS 8541.42.00 → 2,000 No. / week
HTSUS 8541.43.00 → 55 No. / week
TFR effective: Sept 22, 2026 to Dec 3, 2026 · FR Doc. 2026-19537
Commerce may adjust those volumes later if needed to address stockpiling. A new IOR that exceeds the applicable weekly quantity without approval is prohibited from further Polysilicon Product entries before December 4 once Commerce notifies CBP. Commerce and CBP will coordinate against importers and brokers that establish, use, or facilitate multiple IORs or other arrangements to circumvent the program.
Waiver applications
Companies prohibited or restricted under the TFR may apply to Commerce for a waiver. Applications are at www.bis.gov/232 and must be emailed to Polysilicon232@bis.doc.gov. The submission window runs September 22 through December 3, 2026. Commerce intends to respond within 14 days of receipt. Approved applicants are notified in writing; relevant information may go to CBP, which administers the adjustment prospectively after Commerce's approval notice.
- For existing IORs under a prohibition: a waiver can restore importing under the existing-IOR stockpiling framework.
- For new IORs under quantitative limits: a waiver can allow imports subject to the stockpiling restrictions that apply to existing IORs under the supplement.
- Package basics: organization and ownership, projected type/volume/use, legitimate business purpose (pre-existing customers for new IORs; commercial rationale unrelated to Proc. 11052 for flagged existing IORs), senior-official certification under penalty of perjury, and a no-stockpile commitment.
Broker diligence and enforcement risk
Customs brokers that enter Polysilicon Products between September 22 and December 4, 2026 are on notice of an affirmative obligation not to facilitate Section III violations. Before transmitting for a new IOR, the TFR says a broker should at least consider:
- Status: whether the IOR is new (established on or after August 6, 2026)
- Import behavior: other Polysilicon Product entries that week and the precise volume already entered
- Ownership: direct and indirect beneficial owners, other new IORs those owners created, and whether those IORs have met or exceeded the Table 1 quantities
- Disposition: ultimate consignee and delivery user, and whether goods will transfer to or benefit an IOR already under a prohibition
Broker evasion can draw CBP enforcement, including proceedings to revoke or suspend a license under 19 CFR 111.53 or broker penalties under 19 U.S.C. § 1641. 19 CFR 111.32 still bars filing or assisting any claim or paper the broker knows is false, and bars giving information the broker knows or should know is false or misleading in a matter pending before DHS.
- TFR at 91 FR 60505 (FR Doc. 2026-19537): effective Sept 22 through Dec 3, 2026 under Proclamation 11052.
- Existing IORs: Commerce flags volume spikes vs. historic averages (plus affiliate/new-IOR patterns); CBP then blocks further Polysilicon Product entries before Dec 4.
- New IORs (registered on/after Aug 6, 2026): weekly caps of 12 kg (2804.61.00), 7 kg (listed 3818 lines), 2,000 No. (8541.42.00), 55 No. (8541.43.00).
- Waivers: applications at bis.gov/232, email Polysilicon232@bis.doc.gov; Commerce targets a 14-day response.
- Brokers must diligence new-IOR status, weekly volume, ownership webs, and disposition; evasion risk includes 19 CFR 111.53 / 19 U.S.C. § 1641.
- Measures To Restrict Stockpiling of Polysilicon and Polysilicon Derivatives Under Proclamation 11052 (91 FR 60505) · Federal Register / Bureau of Industry and Security
- CSMS #69994928 - GUIDANCE: Import Ban of Certain Polysilicon Products Under Proclamation 11052 · U.S. Customs and Border Protection
This article is for general information and is not legal or tax advice. Drawback eligibility depends on your specific facts, and final refunds are determined by CBP at liquidation. Consult a licensed customs broker or attorney for your situation.