The Uyghur Forced Labor Prevention Act — UFLPA — is the most aggressive forced labor statute the United States has ever enforced. It does something most trade law does not: it reverses the default. Under almost every other import regime, goods are admissible until the government proves a problem. Under the UFLPA, goods with a connection to one region of China are inadmissible until the importer proves their absence.

That single inversion — the rebuttable presumption — is the entire law. Everything else is mechanism. This is a field guide to how that mechanism works, written for compliance officers, supply chain leads, and anyone whose sourcing touches cotton, polysilicon, aluminum, tomatoes, or the dozens of other inputs the law now reaches.

What the law actually does

The UFLPA was enacted as the U.S. response to the Chinese government's systemic use of forced labor against Uyghurs and other ethnic and religious minorities in the Xinjiang Uyghur Autonomous Region — the XUAR, or Xinjiang. The statute directs the Forced Labor Enforcement Task Force, a multi-agency body chaired by the Department of Homeland Security, to build and maintain the strategy for enforcing a prohibition that already existed in principle under Section 307 of the Tariff Act of 1930, but had never been applied at this scale.

Section 307 has long barred goods made wholly or in part with forced labor from entering the United States. What the UFLPA added was not a new prohibition — it was a new presumption. Before the UFLPA, the government had to develop evidence that a specific shipment involved forced labor. After it, for any good with a Xinjiang nexus, that evidentiary burden flips entirely onto the importer.

How the rebuttable presumption works

This is the concept everything turns on, and it is worth stating precisely. CBP applies a rebuttable presumption that goods mined, produced, or manufactured wholly or in part in the XUAR — or by any entity on the UFLPA Entity List — were made with forced labor and are therefore prohibited from importation under 19 U.S.C. § 1307.

Three words in that sentence carry enormous weight:

1. "Wholly or in part" The presumption attaches even if only a fraction of the good — a single input, a raw material processed three tiers down — originates in the XUAR. A garment cut and sewn in Vietnam from cotton grown in Xinjiang is in scope. The finished-goods country of origin does not clear it.
2. "Rebuttable" The presumption is not absolute. An importer can overcome it — but only by providing clear and convincing evidence that the good was not produced with forced labor, responding to specific CBP documentation requests, and demonstrating full supply chain traceability to the raw material level. This is a deliberately high bar.
3. "Presumption" The default is exclusion. The importer is treated as non-compliant until they prove otherwise. No finding of fault is required for the goods to be detained — the nexus alone is sufficient to trigger the hold.

When goods are detained, CBP conducts two types of review: an applicability review (is the shipment actually within UFLPA scope?) and an exception review (has the importer rebutted the presumption with sufficient evidence?). Until one of those resolves in the importer's favor, the goods do not enter U.S. commerce — and demurrage, storage, and delay costs accrue to the importer the entire time.

The Entity List

The UFLPA Entity List is the operational core of enforcement. Maintained by DHS and built from four statutory sub-lists, it names specific companies whose goods are subject to the rebuttable presumption regardless of where final assembly occurs. The four sub-lists cover: entities in the XUAR that produce goods with forced labor; entities working with the Xinjiang government to transfer persecuted groups into labor programs; entities that exported such goods into the U.S.; and facilities — including the Xinjiang Production and Construction Corps — sourcing through "poverty alleviation" or "pairing-assistance" labor-transfer schemes.

As of 2026, the list stands at 144 entities. The largest single expansion came on January 15, 2025, when DHS added 37 companies in one action — the biggest addition since enactment — spanning cotton, polysilicon, and critical minerals including copper, lithium, and tungsten.

Screening suppliers against the Entity List is necessary but not sufficient. The "wholly or in part" standard means a clean direct supplier can still carry exposure through sub-tier sourcing the importer has never mapped. CBP has been explicit that generic supplier certifications and form-letter attestations are inadequate in high-risk sectors.

High-priority sectors

CBP uses a risk-based targeting approach across the entire tariff schedule, but the FLETF designates specific sectors as high-priority for heightened enforcement. As of the 2025 strategy update — which added caustic soda, jujubes, copper, lithium, and steel — there are 13 high-priority sectors:

The four most heavily affected commercial industries by enforcement volume have consistently been electronics, automotive and aerospace, apparel and textiles, and industrial and manufacturing materials. Lithium-ion batteries and energy storage have become a particular focus in 2025–2026, often arising alongside Section 301 tariff and country-of-origin questions on the same shipment.

Where enforcement stands in 2026

This is where a current field guide has to be careful, because the enforcement picture has shifted in a way that materially affects how companies should think about risk.

Cumulatively, the numbers are large. CBP's revamped 2026 dashboard — which now counts each line-item transaction as a separate "shipment" for granularity — shows the scale of activity since June 2022:

But the recent trend runs the other way, and sharply. According to CBP data reported in early 2026, detention activity has fallen significantly: roughly $183 million in shipments stopped in 2025, against approximately $1.58 billion in 2023 and $1.40 billion in 2024. No new entities have been added to the Entity List during the current administration, compared with 144 additions in prior years — a pause that has drawn criticism from some lawmakers who argue a powerful statutory tool is being underused.

The reputational and financial dimensions also extend beyond CBP detentions. Scrutiny of banks and investors financing companies with alleged forced-labor links has continued independent of customs enforcement — meaning legal permissibility at the border does not equate to reputational safety.

What compliance actually requires

Rebutting the presumption is not a documentation exercise that begins when a container is detained. It begins at onboarding, because the evidence CBP requires cannot be reconstructed retroactively under a detention clock. Practical compliance requires:

1. Supply chain mapping to raw material Not Tier 1. The "wholly or in part" standard means traceability has to reach the cotton gin, the polysilicon refiner, the smelter — wherever the input enters the chain.
2. Entity List and ownership screening Direct suppliers and their sub-tiers, including affiliates and aliases of listed entities, screened on an ongoing basis as the list changes.
3. A documented, defensible evidence package Country-of-origin documentation, transaction records, isotopic or other origin testing where applicable, and third-party audits — assembled and maintained before a detention, attached to the specific facility.
4. An immutable audit trail Every data point's origin and modification history preserved in a form that survives examination by a CBP officer assuming nothing — and producible as a complete dossier on a detention timeline measured in days, not weeks.

The bottom line

The UFLPA is not a screening obligation. It is a reversal of the burden of proof, enforced through customs detention, in which the importer is presumed non-compliant until they prove otherwise to a clear and convincing standard. The current enforcement slowdown changes the probability of detention. It does not change the legal exposure, the standard of proof, or the cost of being unprepared when a container is held.

The companies that treat the quiet period as a reason to deprioritize traceability are making a cyclical bet against a statute explicitly designed by its authors to outlast administrations. The companies that use it to build the evidence infrastructure properly — before they need it — are the ones that move a detained shipment through review in days rather than weeks.