9903.03.13—Section 338 Canada
Published rate notation
The duty provided in the applicable subheading + 50%
Active for entries on or after 2026-08-22; no expiration is on file.
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 9903.03.13 is a Chapter 99 tariff modification under Section 338 Canada. For a qualifying entry during this provision's effective period, the published rate notation is the duty provided in the applicable subheading + 50%; the source instructions determine how that notation relates to the underlying base duty. Its published country scope lists CA. Active for entries on or after 2026-08-22; no expiration is on file.
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 2026-08-22; no expiration is on file. 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
Articles the product of Canada as provided in subdivision (b)(2) of U.S. note 51 to this subchapter
How to use this provision
Filing mechanics during the provision's effective period
Chapter 99 provision 9903.03.13 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 9903.03.13 on a separate line.
Target countries
Published country scope for entries during the provision's effective period
Related Chapter 99 codes(4)
Other Section 338 Canada provisions in Tandom's catalog
9903.03.12Articles the product of Canada as provided in subdivision (b)(1) of U.S. note 51 to this subchapterActive9903.03.14Articles the product of Canada as provided in subdivision (b)(3) of U.S. note 51 to this subchapterActive9903.03.15Articles of aluminum, of steel or of copper or derivative aluminum or steel articles; passenger vehicles (sedans, sport utility vehicles, crossover utility vehicles, minivans and cargo vans) and light trucks; parts of passenger vehicles (sedans, sport utility vehicles, crossover utility vehicles, minivans and cargo vans) and light trucks; medium- and heavy-duty vehicles; parts of medium- and heavy-duty vehicles; wood products; semiconductor articles; and patented pharmaceutical articles, as provided in subdivision (c) of U.S. note 51 to this subchapterActive9903.03.16Articles of civil aircraft (all aircraft other than military aircraft and unmanned aircraft); their engines, parts and components; their other parts, components and subassemblies; and ground flight simulators and their parts and components the product of Canada, as provided for in subdivision (d) of U.S. note 51 to this subchapterFrequently asked questions
What is HTS 9903.03.13?
HTS 9903.03.13 is a Chapter 99 tariff modification under Section 338 Canada, not a product classification. Its published scope describes when it can modify the duty treatment of a base 10-digit HTS code. Scope text: Articles the product of Canada as provided in subdivision (b)(2) of U.S. note 51 to this subchapter
What rate does HTS 9903.03.13 apply?
The provision's published rate notation is: "The duty provided in the applicable subheading + 50%" 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 9903.03.13?
The published country scope for 9903.03.13 lists: CA.
Is HTS 9903.03.13 currently active?
Source
Authoritative citation that established this provision
Proc-11046;Proc-11047;Proc-11048;Proc-11056;FR-2026-14991;FR-2026-14992;FR-2026-14997;FR-2026-17294;CSMS-69606660;US-Note-51
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.
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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.
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