9903.45.30—Section 201 Safeguard (Quartz)
Published rate notation
25%
Active for entries on or after 2026-08-15 and before 2030-08-15.
Tandom · Duty calculator
Check this provision by 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 9903.45.30 is a Chapter 99 tariff modification under Section 201 Safeguard (Quartz). For a qualifying entry during this provision's effective period, the published rate notation is 25%; the source instructions determine how that notation relates to the underlying base duty. Its published country scope lists all countries, subject to any carve-outs in parallel provisions or the source text. Active for entries on or after 2026-08-15 and before 2030-08-15.
Illustrative rate mechanics for a qualifying entry
This catalog record does not establish an additive rate relationship, so the page preserves the published notation without adding it to the base rate. Active for entries on or after 2026-08-15 and before 2030-08-15. 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
Quartz surface products, as defined in U.S. note 41(a) to this subchapter, if entered in an aggregate quantity during any period specified in U.S. note 41(d) to this subchapter that does not exceed the maximum aggregate quantity specified for that period in such U.S. note (year 1: 25%; note 41(e) step-downs 23%/21%/19% in years beginning 2027-08-15/2028-08-15/2029-08-15)
How to use this provision
Filing mechanics during the provision's effective period
Chapter 99 provision 9903.45.30 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 9903.45.30 on a separate line.
Target countries
Published country scope for entries during the provision's effective period
Published scope: all countries
Related Chapter 99 codes(10)
Other Section 201 Safeguard (Quartz) provisions in Tandom's catalog
9903.45.01If entered in an aggregate quantity, in any quarterly period specified in note 17(i) to this subchapter, not exceeding 300,000 units in any such quarterly period, under the terms of such noteExpired9903.45.02OtherExpired9903.45.05If entered in an annual aggregate quantity not exceeding the quantity specified in note 17(g) to this subchapter, under the terms of such noteExpired9903.45.06OtherExpired9903.45.21If entered in an annual aggregate quantity not exceeding 12.5 gigawatts, under the terms of such noteFrequently asked questions
What is HTS 9903.45.30?
HTS 9903.45.30 is a Chapter 99 tariff modification under Section 201 Safeguard (Quartz), not a product classification. Its published scope describes when it can modify the duty treatment of a base 10-digit HTS code. Scope text: Quartz surface products, as defined in U.S. note 41(a) to this subchapter, if entered in an aggregate quantity during any period specified in U.S. note 41(d) to this subchapter that does not exceed the maximum aggregate quantity specified for that period in such U.S. note (year 1…
What rate does HTS 9903.45.30 apply?
The provision's published rate notation is: "25%" 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 9903.45.30?
The published country scope for 9903.45.30 lists all countries, subject to carve-outs in parallel Chapter 99 provisions or the source text.
Is HTS 9903.45.30 currently active?
Source
Authoritative citation that established this provision
FR-2026-15975;91-FR-50645;HTSUS-2026-Rev16-note-41;extraction-run:quartz-safeguard-20260823
Open on federalregister.govLearn 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