9903.05.90: Section 301 Forced Labor Exemption Explained

Key Points

• HTS 9903.05.90 is a claim and exemption heading, not a duty-adding heading: it carries no additional duty of its own and instead signals that an importer is claiming relief from Section 301 forced labor duties under U.S. note 52(f) to Chapter 99.
• The rate column for this heading reads "the duty provided in the applicable subheading," meaning the entry pays only the regular Chapter 1-97 column 1 rate, not an additional Section 301 forced labor surcharge.
• The product scope is broad: articles of aluminum, steel, or copper (and derivative articles); passenger vehicles and light trucks and their parts; medium- and heavy-duty vehicles and their parts; wood products; patented pharmaceutical articles; and semiconductor articles.
• Eligibility is governed by subdivision (f) of U.S. note 52 to the Chapter 99 subchapter, which you must confirm in the current HTSUS for the full qualifying criteria.
• This heading belongs to the 9903.05.85-onward exemption block within the Section 301 forced labor program; compare it with companion headings such as 9903.05.88 (civil aircraft) and 9903.05.85 (transit exemption).

On this page

1. What 9903.05.90 is and what it does
2. Affected products and HTS coverage
3. How the rate works: no additional duty
4. Interaction with other tariff provisions and forced labor duties
5. How 9903.05.90 appears on a customs entry
6. What importers should do
7. Key references

HTS 9903.05.90 is a Section 301 forced labor exemption heading. When claimed correctly on a customs entry alongside the underlying Chapter 1-97 classification, it signals that the imported goods qualify for relief from forced labor-related Section 301 duties under the conditions set out in subdivision (f) of U.S. note 52 to the Chapter 99 subchapter. The heading imposes no duty of its own; the column 1 rate simply reads "the duty provided in the applicable subheading." All facts below reflect the HTSUS as of September 20, 2026.

The links in this article go to the primary documents: the official tariff schedule, CBP guidance pages, and government source material itself. Read the source.

What 9903.05.90 is and what it does

Chapter 99 of the HTSUS is reserved for temporary and special-program provisions. Within that chapter, the 9903.05.xx block houses the Section 301 forced labor tariff headings, which impose additional duties on goods produced with forced labor from covered countries. Starting at 9903.05.85, a series of exemption headings carves out specific product categories or circumstances where those additional duties do not apply, or apply at a reduced level.

9903.05.90 is one of those exemption headings. An importer who claims it is asserting that their goods fall within the product list described in the official heading text and satisfy the conditions of U.S. note 52(f) to the Chapter 99 subchapter. The heading does not impose a new surcharge; it removes or reduces one.

This is the opposite of a duty-adding heading. Framing it incorrectly on an entry, or omitting it when it applies, can result in overpayment or underpayment of duties. Either outcome can trigger a CBP inquiry or require a formal correction.

Affected products and HTS coverage

The official heading text for 9903.05.90, as it appears in the HTSUS, covers the following product categories, all subject to the qualifying conditions in U.S. note 52(f):

• Articles of aluminum, of steel, or of copper, and derivative aluminum or steel articles
• Passenger vehicles, specifically sedans, sport utility vehicles, crossover utility vehicles, minivans, and cargo vans
• Light trucks
• Parts of the passenger vehicles and light trucks listed above
• Medium- and heavy-duty vehicles
• Parts of medium- and heavy-duty vehicles
• Wood products
• Patented pharmaceutical articles
• Semiconductor articles

This is a diverse product scope deliberately assembled to match the categories that the underlying forced labor duty provisions target. If your goods fall in one of these categories but you are unsure whether the specific subheading qualifies, confirm eligibility against U.S. note 52(f) in the current HTSUS at hts.usitc.gov. The facts block is silent on country-of-origin restrictions specific to this heading; consult a broker or the current schedule to confirm whether origin affects eligibility.

How the rate works: no additional duty

The HTSUS general column rate for 9903.05.90 is: "The duty provided in the applicable subheading." That language is the standard HTSUS formulation for an exemption or pass-through heading. It means:

• No percentage surcharge is added by this heading itself.
• The entry pays the normal Chapter 1-97 column 1 general rate for the underlying classification.
• The forced labor Section 301 additional duty that would otherwise apply is waived or reduced for qualifying goods under this heading.

Compare this with duty-adding headings elsewhere in the 9903.05.xx block, such as 9903.05.84 (Vietnam, 12.5%) or 9903.05.83 (Venezuela, 12.5%), which add a positive duty rate on top of the regular subheading rate. 9903.05.90 works in the opposite direction.

Use the CustomsGenius duty calculator to model how the Chapter 1-97 rate and any other applicable Chapter 99 provisions stack for a specific entry.

Interaction with other tariff provisions and forced labor duties

Section 301 forced labor duties are layered onto entries through Chapter 99 headings. When 9903.05.90 applies, it supersedes or offsets the specific forced labor surcharge that would otherwise be claimed under another 9903.05.xx heading for the same goods. However, other Chapter 99 duties, such as Section 232 duties on steel and aluminum articles, Section 301 trade action duties unrelated to forced labor, or antidumping and countervailing duties, are separate and are not affected by this exemption heading. Each must be analyzed independently.

For goods that may also implicate the Uyghur Forced Labor Prevention Act rebuttable presumption, note that 9903.05.90 operates within the HTSUS tariff framework and does not by itself resolve UFLPA admissibility questions at CBP. See our article on overcoming the UFLPA rebuttable presumption for that separate analysis.

If an entry was previously liquidated with the forced labor duty applied and 9903.05.90 should have been claimed, a CBP protest under 19 U.S.C. 1514 may be the appropriate corrective mechanism. See CBP Protest 19 USC 1514: Challenging Liquidation Decisions for procedural detail.

How 9903.05.90 appears on a customs entry

Like all Chapter 99 codes, 9903.05.90 is reported as a second HTS line on the CBP entry alongside the primary Chapter 1-97 classification. It does not replace the underlying subheading; both lines must appear. The Chapter 1-97 line carries the merchandise description, quantity, value, and normal duty rate. The 9903.05.90 line signals the exemption claim.

Brokers entering this code in ACE must ensure that the Chapter 1-97 subheading is eligible under U.S. note 52(f) before claiming the exemption. Mismatched combinations, for example claiming 9903.05.90 for a product category not listed in the heading text, can generate ACE filing errors or post-entry CBP scrutiny. Confirm the pairing with the current HTSUS and CBP guidance at cbp.gov before filing.

For a broader view of how Chapter 99 special-program codes work across the 2026 tariff schedule, see our 2026 tariff code overview.

What importers should do

• Verify product eligibility. Cross-check your Chapter 1-97 subheading against the product list in the 9903.05.90 heading text and the conditions in U.S. note 52(f) of the current HTSUS before claiming the exemption on any entry.
• Audit past entries. If you imported goods in the categories covered by this heading and did not claim 9903.05.90, review whether the forced labor duty was incorrectly assessed and whether a CBP protest under 19 U.S.C. 1514 is warranted within the applicable time limit.
• Coordinate with your broker on ACE filing. Ensure both the Chapter 1-97 line and the 9903.05.90 Chapter 99 line are correctly structured in the entry summary to avoid rejection or post-liquidation correction requests.
• Monitor for updates to U.S. note 52. The qualifying conditions and product scope of exemption headings in the 9903.05.xx block are subject to change; check the HTSUS and Federal Register regularly for amendments.

Key references

• HTSUS online edition, hts.usitc.gov: the authoritative source for heading 9903.05.90, U.S. note 52(f), and all Chapter 99 provisions.
• CBP.gov: CBP guidance, CSMS messages, and entry filing instructions for Chapter 99 special-program codes.
• Federal Register, federalregister.gov: notices and rules governing Section 301 forced labor tariff actions and exemptions.
• White House, whitehouse.gov: executive orders and proclamations establishing or modifying the Section 301 forced labor tariff program.
• 19 U.S.C. 2411, law.cornell.edu: the statutory authority underlying Section 301 trade actions.
• 9903.05.88: Civil Aircraft Section 301 Forced Labor Exemption: companion exemption heading for civil aircraft.
• 9903.05.85 Section 301 Forced Labor Transit Exemption Explained: companion exemption heading for goods in transit.
• CBP Protest 19 USC 1514: Challenging Liquidation Decisions: how to contest incorrectly assessed forced labor duties after liquidation.
• UFLPA Rebuttable Presumption: How to Overcome It at CBP: separate admissibility framework that may apply alongside this tariff heading.