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Chapter 98 of the Harmonized Tariff Schedule of the United States (HTSUS) is a set of special classification provisions, not a product chapter. An article is classified there only when the conditions written into the provision are met, and a provision can give free entry or duty on part of the value. This guide explains the chapter as a system for lab and clinic importers, with the 9801, 9802, 9810 and 9817 provisions people search for. It is general information, not customs or legal advice.
Short answer
Chapter 98 HTS holds provisions that apply because of what happened to the goods (returned after export, repaired or assembled abroad) or who is importing them (a nonprofit educational or scientific institution, a government, a visitor). U.S. Note 1 says an article described in a chapter 98 provision is classifiable there if the provision’s conditions and any applicable regulations are met, and the chapter is not subject to the rule of relative specificity in general rule of interpretation 3(a). The duty treatment is whatever the specific line says, often “Free” or duty on only a part of the value.
Definition and scope
Chapter 98 sits in Section XXII of the HTSUS, titled “Special Classification Provisions; Temporary Legislation; Temporary Modifications Established Pursuant to Trade Legislation; Additional Import Restrictions Established Pursuant to Section 22 of the Agricultural Adjustment Act”. The USITC publishes it as part of the schedule at hts.usitc.gov. This guide uses Revision 22 (2026), checked 2026-11-01.
The chapter is organised in subchapters. Those relevant to goods moving in and out of labs and clinics:
- Subchapter I (9801): articles exported and returned, not advanced or improved in condition; animals exported and returned.
- Subchapter II (9802): articles exported and returned, advanced or improved abroad.
- Subchapter X (9810): importations of religious, educational, scientific and other institutions.
- Subchapter XI to XIII: samples for soliciting orders; articles admitted free of duty under bond for permanent exhibition; articles admitted temporarily free of duty under bond.
- Subchapter XVII (9817): other special classification provisions.
Other subchapters cover personal exemptions (IV to VII), the United States Government (VIII), foreign governments and international organizations (IX), vessel parts and repairs (XVIII), and textile and Caribbean Basin provisions (XIX and XX).
How chapter 98 works in practice
Note 1: conditions, not specificity
Outside chapter 98, an article that could fit two headings is resolved by the most specific description. Chapter 98 is excluded from that rule. If an article is described by a chapter 98 provision and the provision’s conditions and requirements, and those of any applicable regulations, are met, it is classifiable there.
Note 2: earlier importation does not change status
Unless a provision says otherwise, an article’s tariff status is not affected by having been imported before and cleared through customs, whether or not duty was paid.
Dual numbers in statistical reporting
For chapter 98 articles whose duty rate is derived from another provision, Statistical Note 2 asks for the 10-digit chapter 98 number followed by the reporting number of the provision the rate comes from. The note’s own example is 9802.00.4040-8515.31.0000, for arc welding machines exported for repair under warranty, quantity 10. For subchapter XVII lines such as 9817.00.50, 9817.00.60 and 9817.00.96, the statistical note asks for the chapter 1 to 97 number that would apply but for the subchapter, with quantities in that chapter’s units. These numbers apply to imports only, not to Shipper’s Export Declarations. To search the schedule itself, see how to search the USITC HTS and read a result.
HTS 9801: goods returned after export
Heading 9801.00.10 covers “products of the United States when returned after having been exported, or any other products when returned within 3 years after having been exported, without having been advanced in value or improved in condition by any process of manufacture or other means while abroad”. The rate is Free. Its statistical lines separate, for example, articles previously exported with intent to reimport after temporary use abroad (.10) from articles returned temporarily for repair, alteration or processing and to be re-exported (.12). Subchapter I U.S. Note 1 says its provisions, except 9801.00.70 and 9801.00.80, do not apply to articles exported with the benefit of drawback or similar benefits.
HTS 9802: repair and assembly abroad
Subchapter II covers articles returned after being exported to be advanced in value or improved in condition. Three headings matter most:
- 9802.00.40 covers repairs or alterations made pursuant to a warranty; duty applies on the value of the repairs or alterations.
- 9802.00.60 covers certain metal articles manufactured or processed in the United States, exported for further processing and returned for further processing; duty applies on the value of the processing.
- 9802.00.80 covers articles assembled abroad in whole or in part of fabricated components that are products of the United States, which (a) were exported ready for assembly without further fabrication, (b) have not lost their physical identity by change in form or shape, and (c) have not been advanced in value or improved in condition abroad except by assembly and incidental operations such as cleaning, lubricating and painting. Duty applies on the full value of the imported article less the cost or value of the U.S. components.
The Customs regulations define “assembly” for these provisions as “the fitting or joining together of fabricated components” (19 CFR 10.12). Port fees are a separate question from duty; the guide to the Harbor Maintenance Fee and its MPF differences covers how chapter 98 articles are treated there.
HTS 9810: institutions, including lab instruments
Subchapter X is the one most relevant to research laboratories. Heading 9810.00.60 covers articles entered for the use of a nonprofit institution, public or private, established for educational or scientific purposes: instruments and apparatus, if no instrument or apparatus of equivalent scientific value for the intended purposes is being manufactured in the United States. The rate is Free.
- Scope of “instruments and apparatus”: U.S. Note 6(a) limits the term to instruments and apparatus that are both provided for and dutiable in the chapter and heading ranges the note lists (for example heading 3914, subheadings 7017.10 to 7017.90 and heading 7020.00, and ranges within chapters 84 and 85). A lab article outside those ranges does not qualify under this line.
- Related lines: 9810.00.65 covers repair components for apparatus under 9810.00.60; 9810.00.67 covers tools specially designed for the maintenance, checking, gauging or repair of such apparatus.
- Use condition: U.S. Note 1 requires that articles be exclusively for the use of the institutions involved and not for distribution, sale or other commercial use within 5 years after being entered, with listed exceptions. Transfer to another qualifying institution is allowed. If an article is transferred otherwise or used commercially within the 5 years, the institution must promptly notify customs officers at the port of entry and is liable for duty on the article in its condition as imported.
- Medical apparatus: 9810.00.80 covers articles imported for a nonprofit institution established for educational, scientific or therapeutic purposes: apparatus using a radioactive substance in medical diagnosis or therapeutic treatment, including the radioactive material when contained in the apparatus as an integral element, and parts or accessories. The rate is Free.
HTS 9817: other special classification provisions
Subchapter XVII is titled “Other special classification provisions”. It is a mixed set, not a medical-items subchapter. Lines covered here include:
- 9817.00.40 and 9817.00.48: educational and scientific visual or auditory materials (for example developed film, slides, recordings, models, charts, maps, globes and posters, and mock-ups or visualizations of abstract concepts such as molecular structures), Free, only where a designated federal agency has made a determination under the Beirut Agreement, or the importer certifies use by an approved institution under the Nairobi Protocol (U.S. Note 1).
- 9817.00.50 and 9817.00.60: machinery, equipment and implements for agricultural or horticultural purposes, and parts for headings 8432, 8433, 8434 and 8436, Free.
- 9817.00.92, .94 and .96: raised-print books and music, Braille tablets and similar articles, and “articles specially designed or adapted for the use or benefit of the blind or other physically or mentally handicapped persons”, with parts and accessories, Free.
U.S. Note 4(a) defines the persons covered as anyone with a permanent or chronic physical or mental impairment that substantially limits one or more major life activities. Note 4(b) says 9817.00.92, .94 and .96 do not cover articles for acute or transient disability; spectacles, dentures and cosmetic articles for individuals not substantially disabled; therapeutic and diagnostic articles; or medicine or drugs.
Where it matters for labs and clinics: a reading table
| Provision | Condition stated in the schedule | Duty treatment stated |
|---|---|---|
| 9801.00.10 | U.S. products returned, or other products returned within 3 years, not advanced in value or improved in condition abroad | Free |
| 9802.00.40 | Repairs or alterations made pursuant to a warranty | Duty on the value of the repairs or alterations |
| 9802.00.60 | Metal articles processed in the U.S., exported for further processing, returned for further processing | Duty on the value of the processing |
| 9802.00.80 | U.S. fabricated components exported ready for assembly, assembled abroad, identity kept | Duty on full value less U.S. components |
| 9810.00.60 | Instruments and apparatus for a nonprofit educational or scientific institution; no equivalent made in the U.S.; Note 6 scope; 5-year exclusive-use rule | Free |
| 9810.00.80 | Radioactive-substance medical diagnostic or therapeutic apparatus for a qualifying nonprofit institution | Free |
| 9817.00.96 | Articles specially designed for persons with permanent or chronic impairment; Note 4(b) exclusions | Free |
What the notes imply you need to be able to show
- For returned goods: that the goods were exported, when, and that they were not advanced in value or improved in condition abroad (9801), or what repair, processing or assembly was done and its value (9802).
- For 9810.00.60: that the importer is a nonprofit institution established for educational or scientific purposes, that the article falls within the headings Note 6(a) lists, and that the article is for the institution’s exclusive use for 5 years.
- For 9817: that the article matches the specific line and, for 9817.00.96, that it is not excluded by Note 4(b).
- For reporting: the 10-digit chapter 98 number plus the reporting number of the provision the rate comes from, where the statistical notes require it.
Chapter 98 relief is separate from other duty layers. Section 301 duties on syringes, gloves and masks, for example, are covered in the guide to Section 301 tariffs on medical products. Separately, some imported biological materials need a permit whatever the duty treatment; see the CDC import permit guide.
Common misunderstandings
“9817 means medical items”
No. 9817 is subchapter XVII, “Other special classification provisions”. Only the 9817.00.92 to .96 lines concern articles for persons with disabilities, and Note 4(b) excludes therapeutic and diagnostic articles and medicine from them.
“The most specific code always wins”
Not for chapter 98. Note 1 takes it outside general rule of interpretation 3(a); the question is whether the provision’s conditions are met.
“Any lab equipment bought by a university enters free under 9810”
The 9810.00.60 line has several conditions: the importer type, the no-equivalent-made-in-the-U.S. test, the Note 6(a) scope and the 5-year use rule. Being a university is one of them, not all of them.
“Free means no paperwork”
A “Free” rate describes duty treatment once conditions are met. The chapter’s notes and the applicable regulations set those conditions.
FAQ
What is chapter 98 of the HTS?
It is the HTSUS chapter of special classification provisions, covering returned goods, goods repaired or assembled abroad, institutional and government imports, and other listed cases. Each line states its own conditions and duty treatment.
What is HTS 9817?
Subchapter XVII, “Other special classification provisions”. It includes educational and scientific materials, agricultural machinery and equipment, and articles for persons with permanent or chronic impairments.
What is HTS 9801?
Subchapter I, covering articles exported and returned without being advanced in value or improved in condition abroad. Heading 9801.00.10 is Free.
What is HTS 9802?
Subchapter II, covering articles exported and returned after being advanced in value or improved abroad, for example through repair, processing or assembly. Duty generally applies to the added value, as stated on each line.
Sources
- U.S. International Trade Commission, Harmonized Tariff Schedule of the United States, Revision 22 (2026), Chapter 98 (U.S. Notes, Statistical Notes, subchapters I, II, X and XVII); chapter PDF: hts.usitc.gov Chapter 98. Date checked: 2026-11-01.
- 19 CFR 10.12, definitions, via Cornell Legal Information Institute. Date checked: 2026-11-01.
