On September 22, 2026, the Bureau of Industry and Security (BIS) filed a rule that does something importers rarely see: it tells your customs broker, by name, what diligence it owes before it files your entry — and it points at the broker's license if the diligence does not happen. The commodity is polysilicon. The precedent is not. If you are choosing a filer — or deciding to keep filing yourself — this is the part worth reading.
The Rule, in One Paragraph
The document is a BIS temporary final rule, "Measures to Restrict Stockpiling of Polysilicon and Polysilicon Derivatives Under Proclamation 11052" — Federal Register document 2026-19537, RIN 0694-AK57, Docket No. 260915-0004, amending 15 CFR part 705. It was filed for public inspection on September 22, 2026, publishes September 24, and states its own window: effective September 22, 2026, through December 3, 2026. It exists because Proclamation 11052's Section 232 (national-security tariff) duties land December 4, 2026, and Commerce wants to stop importers pulling volume forward into the gap. Small weekly entry caps apply to importer-of-record (IOR) numbers established on or after August 6, 2026, and a Commerce waiver path stays open until December 3, 2026.
That is the whole commodity story, and for most importers it ends there. The part that travels is paragraph (g).
Paragraph (g): Four Things Your Broker Has to Consider
A new paragraph (g) in supplement no. 1 to part 705 reminds brokers who enter these products, or act as IOR, between September 22 and December 4, 2026, of "their affirmative obligation to avoid facilitating violations." In deciding whether a new IOR may be using the broker's services to violate the rule, a broker "should at least consider" four factors:
- Status — whether the IOR was established on or after August 6, 2026.
- Import Behavior — whether that new IOR has made other entries of polysilicon products during the current week "and, if so, the precise volume."
- Ownership — the direct and indirect beneficial owners of the IOR, whether those owners created other new IORs to import these products, and whether any of those have hit their caps.
- Disposition of the Merchandise — the ultimate consignee and the delivery user, and whether the goods will benefit an IOR already under a prohibition.
None of that is answerable from the entry packet. Factor two spans every filer the IOR uses, not just yours; factor three is a corporate-ownership question; factor four is a downstream-delivery question. A filer that can satisfy paragraph (g) already asks those questions before a rule requires it.
The Exposure Is Your Broker's License
BIS pairs the four factors with the baseline duty in 19 CFR 111.32: a broker must not file, procure, or assist in filing any claim or document known by the broker to be false. Then it states the consequence — evasion "may result in CBP enforcement actions," which the rule says could include "proceedings to revoke or suspend the customs broker's license under 19 CFR 111.53" or a broker penalty under 19 U.S.C. 1641.
Note also who gets told. When Commerce reports an importer to CBP, CBP notifies the IOR and "any customs brokers conducting business on behalf of the IOR." Your filer learns about your problem at the same moment you do, from the government, with its own license on the other side of the decision.
This is also the second September 2026 action to aim at an importer's ability to make entry rather than its duty rate — CBP's enhanced enforcement on Form 5106 identity data, which we covered in CBP can void your importer of record number, is the other. A duty-rate error is money. An entry-privilege problem stops the goods.
If You Self-File, There Is No Second Reader
Self-filing is a legitimate choice, and at $30 per entry it is the cheaper one on routine, stable product lines. But notice what paragraph (g) buys an importer who uses a broker: a second licensed party, with its own skin in the game, reading the Federal Register on your lines and running those four factors before the entry goes in. Self-file and that reader is gone. The diligence still has to happen, inside your own compliance function, on your own reading of a rule that published two days after it took effect. Our broker versus self-filing decision framework treats that as its own axis: who, by name, owns regulatory monitoring in your shop.
What to Ask Your Filer This Week
None of this requires you to import polysilicon. It requires you to know how your filer behaves when a rule like this lands on a line you do import.
- Ask how they monitor. Who reads the Federal Register and CBP messages against your tariff lines, how often, and how you get told. "We subscribe to a newsletter" is a different answer than a named person and a cadence.
- Ask what they do with a new IOR. A filer that onboards any new IOR without asking about establishment date, beneficial ownership, and ultimate consignee is a filer that cannot answer paragraph (g) on any rule, not just this one.
- Ask who else files for you. Factor two is a cross-filer question. If two brokers each see half your entries, neither can answer it. Consolidating, or at least telling each filer about the other, is free.
- Check your own IOR establishment date. If your IOR number was established on or after August 6, 2026, you are a "new IOR" for purposes of this rule, and small weekly caps by tariff line apply on these products until December 4, 2026.
- If you are exposed, move now. The Commerce waiver window closes December 3, 2026, and the application carries a senior-officer certification — so the volume numbers need to reconcile to your entry data before anyone signs.
Two Questions We Are Getting
My broker suddenly wants my ownership structure and my end customer. Is that normal?
On these lines, as of September 22, 2026, yes. The rule directs brokers to consider exactly those things and puts their license under 19 CFR 111.53 on the other side of getting it wrong.
I do not import polysilicon. Why does this matter to me?
Because the drafting pattern is portable. A federal agency wrote diligence factors, a false-filing citation, and license revocation into a commodity rule that took effect two days before it published. If a similar rule lands on a line you do import, the question is whether your filer read it.
Get a Filer Who Reads the Rule
Strix Customs works in four modes, and paragraph (g) touches all of them. We clear — licensed brokers filing your entries at $100–$250 per entry, with this kind of diligence built into how we take on a line. We consult — a read of your exposure against a specific rule, including the Commerce waiver path before it closes December 3, 2026. We comply — classification and IOR-data review, because caps and prohibitions are written by tariff line and IOR number. And we automate — ABI-certified (Automated Broker Interface) self-filing at $30 per entry, with licensed brokers reachable when a rule lands. See brokerage and compliance consulting.
Bring us the tariff lines you actually import and we will tell you what is aimed at them. Talk to our team.