9903.05.59 Nigeria Section 301 Forced Labor: 12.5% Duty

Key Points

• HTS 9903.05.59 imposes an additional 12.5 percent ad valorem duty on all products of Nigeria (country code NG), effective July 24, 2026, with no announced end date.
• The duty applies to all Chapter 1 through 97 products of Nigerian origin, regardless of product category or classification.
• Legal authority is the USTR Section 301 Forced Labor Investigation (FLIP) final action dated July 23, 2026, implemented under U.S. note 52 and announced via CSMS 69326983.
• This is a Chapter 99 add-on code: it rides alongside the underlying Chapter 1-97 classification on every affected entry line, it does not replace it.
• Do not confuse this code with 9903.05.01 through 9903.05.09, which cover a separate Section 301 Brazil program, not the forced-labor series.

On this page

1. What 9903.05.59 is and what it covers
2. The Section 301 Forced Labor program and legal authority
3. Rate and effective window
4. Product and country scope
5. How 9903.05.59 stacks with other duties
6. How this code appears on a customs entry
7. What importers should do
8. Key references

The links in this article go to the primary documents: the USTR final action, CSMS message, and official tariff schedule pages themselves. Read the source.

HTS 9903.05.59 is the Chapter 99 add-on code that imposes a 12.5 percent additional ad valorem duty on all products of Nigeria, effective July 24, 2026, under the Section 301 Forced Labor Investigation (FLIP) program governed by U.S. note 52. Any importer entering goods manufactured in or originating from Nigeria (country code NG) must declare this code alongside the standard Chapter 1-97 classification and pay the additional duty on each affected line. As of September 11, 2026, no end date has been announced.

What 9903.05.59 is and what it covers

9903.05.59 is one of a series of country-specific subheadings running from 9903.05.20 through 9903.05.84, all part of the Section 301 Forced Labor action administered under U.S. note 52. Each subheading in that range targets a specific country. 9903.05.59 is assigned exclusively to Nigeria.

The scope is broad: U.S. note 52(a) covers all Chapter 1-97 products of Nigerian origin. There is no carve-out by product type, sector, or end use stated in the facts for this code. If the goods are of Nigerian origin, the additional duty applies.

A critical distinction: the codes 9903.05.01 through 9903.05.09 belong to a separate Section 301 program targeting Brazil. Those codes and this one share the same parent Chapter 99 but are entirely different programs. Do not conflate them when classifying entries or auditing prior filings.

For comparison with other countries in the same forced-labor series, see the related articles on 9903.05.58 Nicaragua and 9903.05.53 Libya, both also carrying a 12.5 percent rate.

The Section 301 Forced Labor program and legal authority

The Section 301 Forced Labor Investigation (FLIP) is a trade action in which USTR investigates whether foreign government practices, including tolerance of forced labor, burden or restrict U.S. commerce. When USTR makes an affirmative finding, it can impose additional duties on products from the subject country.

For Nigeria, USTR issued its final action on July 23, 2026. The tariff modification took effect the following day, July 24, 2026. The governing legal framework is U.S. note 52 to the Harmonized Tariff Schedule, which establishes the rules for the entire 9903.05.20 through 9903.05.84 country-heading series. CBP operationalized the change through CSMS 69326983.

Importers and brokers should read U.S. note 52 directly in the official HTS at hts.usitc.gov to understand applicability conditions, and review CBP's CSMS system at cbp.gov for operational instructions.

Rate and effective window

The additional duty under 9903.05.59 is 12.5 percent ad valorem. This rate applies to the customs value of the imported goods.

• Rate: 12.5 percent additional ad valorem
• Effective from: July 24, 2026
• End date: None announced as of September 11, 2026

Because no sunset or review date is provided in the program facts, importers should treat this rate as open-ended until USTR or CBP announces a modification. Confirm the current status in the HTSUS or via CBP CSMS before each entry cycle.

Product and country scope

9903.05.59 covers:

• Country: Nigeria (NG) only within this subheading
• Products: All Chapter 1-97 products, per U.S. note 52(a), with no product exclusions listed in the facts for this code
• Effective period: July 24, 2026 onward, no announced end

Origin is determined under standard CBP rules for country of origin. If goods are substantially transformed in Nigeria, or if Nigeria is the last country of substantial transformation, they are products of Nigeria for purposes of this additional duty. If your supply chain involves Nigerian inputs processed in a third country, confirm origin determination with your broker before assuming this code does or does not apply.

How 9903.05.59 stacks with other duties

This 12.5 percent additional duty is layered on top of, not in place of, all other applicable duties. A typical duty stack for a Nigerian-origin good might include:

• The standard MFN (Column 1 General) rate from the Chapter 1-97 classification
• Any applicable Section 232 or Section 301 duties from other programs that cover the same goods
• The 12.5 percent additional duty under 9903.05.59

The facts block does not indicate an MFN cap for this specific code. For codes in the same forced-labor series where an MFN cap exists, it is stated explicitly. Confirm whether any cap or interaction rule applies to your specific Chapter 1-97 classification by reviewing U.S. note 52 in full and consulting your broker. Use the duty calculator to model the combined duty impact for your specific commodity.

How this code appears on a customs entry

Chapter 99 codes like 9903.05.59 are reported as a second HTS line on the entry alongside the base Chapter 1-97 classification. They do not replace the underlying 10-digit classification. On ACE entries, the sequence is:

1. Line 1: The standard Chapter 1-97 HTS number (with its normal rate of duty and any MPF/HMF)
2. Line 2: 9903.05.59 (with the 12.5 percent additional duty assessed on the same dutiable value)

Brokers should ensure ACE is updated and that the CSMS 69326983 operational instructions are reflected in their filing procedures. The CSMS message is the controlling CBP guidance on how to transmit this code correctly.

For importers building or auditing supplier onboarding processes, the New Supplier Customs Checklist provides a practical framework for catching origin-related duty exposure before goods ship. Companies undergoing acquisitions should also review customs due diligence considerations to identify inherited import liabilities tied to Nigerian-origin supply chains.

What importers should do

• Audit all open purchase orders and shipments with Nigerian-origin goods for entries dated July 24, 2026 or later, and confirm that 9903.05.59 and the 12.5 percent additional duty are correctly declared on each affected entry line.
• Review U.S. note 52 in the current HTSUS and CSMS 69326983 on cbp.gov to confirm the scope conditions and ACE filing requirements for your specific commodity classifications.
• Update landed cost models and procurement contracts to reflect the additional 12.5 percent duty on all Nigerian-origin goods for the duration of this program.
• Conduct a periodic compliance review, including this and related forced-labor codes, as part of your annual self-audit routine, using a structured import compliance checklist.

Key references

• Harmonized Tariff Schedule of the United States (USITC): Official HTS, including Chapter 99 and U.S. note 52 governing 9903.05.59
• CBP.gov CSMS system: CSMS 69326983, the CBP operational message implementing 9903.05.59 for Nigerian-origin goods
• USTR.gov: USTR Section 301 Forced Labor Investigation (FLIP) final action, dated July 23, 2026, establishing the Nigeria additional duty
• Federal Register (federalregister.gov): Federal Register publication of the USTR FLIP final action and related Section 301 forced labor notices
• CustomsGenius 2026 Tariff Code Overview: Summary of major Chapter 99 additions effective in 2026