9903.88.66—Section 301 Exclusion
Published rate notation
The duty provided in the applicable subheading
Expired for entries on or after 2023-06-01.
Tandom · Duty calculator
Check a historical entry date
Pick a mapped 10-digit code and enter origin, value, and entry date. The calculator determines which Chapter 99 measures apply to that scenario; it does not force this provision into the result.
Plain-English explanation
HTS 9903.88.66 is a Chapter 99 tariff modification under Section 301 Exclusion. For a qualifying entry during this provision's effective period, the published rate notation is the duty provided in the applicable subheading; the source instructions determine how that notation relates to the underlying base duty. Its published country scope lists CN. Expired for entries on or after 2023-06-01.
Historical or scheduled rate mechanics
This catalog record does not establish an additive rate relationship, so the page preserves the published notation without adding it to the base rate. Expired for entries on or after 2023-06-01. The calculator checks the selected entry date and shipment facts before including any Chapter 99 provision.
Description
Authoritative scope text from the U.S. Harmonized Tariff Schedule
Effective with respect to entries on or after December 1, 2021, and before June 1, 2023, articles the product of China, as provided for in U.S. note 20(sss) to this subchapter, each covered by an exclusion granted by the U.S. Trade Representative
How to use this provision
Filing mechanics during the provision's effective period
Chapter 99 provision 9903.88.66 is a tariff modification — it doesn't classify a product on its own. When a base 10-digit HTS code falls within this provision's scope during its effective period and a shipment matches the country and date conditions, the broker declares the base code at entry and follows the source instructions for reporting 9903.88.66 on a separate line.
Target countries
Published country scope for entries during the provision's effective period
Related Chapter 99 codes(24)
Other Section 301 Exclusion provisions in Tandom's catalog
9903.05.01Except for products described in headings 9903.05.02–9903.05.09, articles the product of Brazil, as provided for in subdivision (a) of U.S. note 50 to this subchapterActive9903.05.02Articles the product of Brazil that (1) were loaded onto a vessel at the port of loading and in transit on the final mode of transit prior to entry into the United States before 12:01 a.m. eastern time on July 22, 2026; and (2) are entered for consumption, or withdrawn from warehouse for consumption, before 12:01 a.m. eastern time on July 29, 2026Expired9903.05.03Articles the product of Brazil, as provided for in subdivision (a)(ii) of U.S. note 50 to this subchapterActive9903.05.04Articles the product of Brazil, as provided for in subdivision (a)(iii) of U.S. note 50 to this subchapterFrequently asked questions
What is HTS 9903.88.66?
HTS 9903.88.66 is a Chapter 99 tariff modification under Section 301 Exclusion, not a product classification. Its published scope describes when it can modify the duty treatment of a base 10-digit HTS code. Scope text: Effective with respect to entries on or after December 1, 2021, and before June 1, 2023, articles the product of China, as provided for in U.S. note 20(sss) to this subchapter, each covered by an exclusion granted by the U.S. Trade Representative
What rate does HTS 9903.88.66 apply?
The provision's published rate notation is: "The duty provided in the applicable subheading" Tandom's catalog does not identify this record as an additive rate, so consult the source instructions for how the notation relates to the base HTSUS rate. Use the Tandom calculator for a dated scenario.
What country scope is listed for HTS 9903.88.66?
The published country scope for 9903.88.66 lists: CN.
Is HTS 9903.88.66 currently active?
Learn more
Tandom guides relevant to this code
How Chapter 99 tariff layers stack on a single entry
How to read, order, and report Chapter 99 HTS codes alongside the base classification on a US entry summary in 2026. The full stacking ladder for brokers and compliance teams.
Open resource
How to calculate US import duties
A working guide to the inputs, the layers, and the math behind a US entry summary in 2026. Written for brokers, forwarders, and importer compliance teams.
Open resource