CSMS 5084401·Trade policy·March 25, 2025·View on csms.cbp.gov ↗

Initiation of countervailing duty investigation of certain chassis and subassemblies thereof from Thailand (C-549-855)

Plain-English explanation

CSMS 5084401 is a U.S. Customs and Border Protection (CBP) Cargo Systems Messaging Service bulletin (trade policy), published on March 25, 2025. It carries the official CBP guidance brokers and importers must follow for the topic — "Initiation of countervailing duty investigation of certain chassis and subassemblies thereof from Thailand (C-549-855)". It links to 1 AD/CVD case in Tandom's catalog. CSMS messages are the operational layer between Commerce determinations and at-the-border collections: when Commerce publishes a new rate, scope ruling, or instruction, CBP turns it into a CSMS that ACE/ACS systems and brokers act on.

Linked AD/CVD cases(1)

Cases referenced or affected by this CSMS message

C-549-855

Message body

Full text as published by U.S. Customs and Border Protection

1. On 03/24/2025, Commerce published in the Federal Register its initiation of the countervailing duty investigation of certain chassis and subassemblies thereof from Thailand (90 FR 13452). The effective date of this initiation is 03/18/2025 (the applicable date stated in the FR notice). 2. The merchandise covered by this investigation consists of chassis and subassemblies thereof, whether finished or unfinished, whether assembled or unassembled, whether coated or uncoated, regardless of the number of axles, for carriage of containers, or other payloads (including self-supporting payloads) for road, marine roll-on/roll-off (RORO) and/or rail transport. Chassis are typically, but are not limited to, rectangular framed trailers with a suspension and axle system, wheels and tires, brakes, a lighting and electrical system, a coupling for towing behind a truck tractor, and a locking system or systems to secure the shipping container or containers to the chassis using twistlocks, slide pins or similar attachment devices to engage the corner fittings on the container or other payload. Subject merchandise includes, but is not limited to, the following subassemblies: - Chassis frames, or sections of chassis frames, including kingpin assemblies, bolsters consisting of transverse beams with locking or support mechanisms, goosenecks, drop assemblies, extension mechanisms and/ or rear impact guards; - Running gear assemblies or axle assemblies for connection to the chassis frame, whether fixed in nature or capable of sliding fore and aft or lifting up and lowering down, which may or may not include suspension(s) (mechanical or pneumatic), wheel end components, slack adjusters, axles, brake chambers, locking pins, and tires and wheels; - Landing gear assemblies, for connection to the chassis frame, capable of supporting the chassis when it is not engaged to a tractor; and - Assemblies that connect to the chassis frame or a section of the chassis frame, such as, but not limited to, pintle hooks or B-trains (which include a fifth wheel), which are capable of connecting a chassis to a converter dolly or another chassis. Importation of any of these subassemblies, whether assembled or unassembled, constitutes an unfinished chassis for purposes of this investigation. Subject merchandise also includes chassis, whether finished or unfinished, entered with or for further assembly with components such as, but not limited to: Hub and drum assemblies, brake assemblies (either drum or disc), axles, brake chambers, suspensions and suspension components, wheel end components, landing gear legs, spoke or disc wheels, tires, brake control systems, electrical harnesses and lighting systems. Processing of finished and unfinished chassis and components such as trimming, cutting, grinding, notching, punching, drilling, painting, coating, staining, finishing, assembly, or any other processing either in the country of manufacture of the in-scope product or in a third country does not remove the product from the scope. Inclusion of other components not identified as comprising the finished or unfinished chassis does not remove the product from the scope. Individual components entered and sold by themselves are not subject to the investigation, but components entered with or for further assembly with a finished or unfinished chassis are subject merchandise. A finished chassis is ultimately comprised of several different types of subassemblies. Within each subassembly there are numerous components that comprise a given subassembly. This scope excludes dry van trailers, refrigerated van trailers and flatbed trailers. Dry van trailers are trailers with a wholly enclosed cargo space comprised of fixed sides, nose, floor and roof, with articulated panels (doors) across the rear and occasionally at selected places on the sides, with the cargo space being permanently incorporated in the trailer itself. Refrigerated van trailers are trailers with a wholly enclosed cargo space comprised of fixed sides, nose, floor and roof, with articulated panels (doors) across the rear and occasionally at selected places on the sides, with the cargo space being permanently incorporated in the trailer and being insulated, possessing specific thermal properties intended for use with self-contained refrigeration systems. Flatbed (or platform) trailers consist of load-carrying main frames and a solid, flat or stepped loading deck or floor permanently incorporated with and supported by frame rails and cross members. The finished and unfinished chassis subject to this investigation are typically classified in the Harmonized Tariff Schedule of the United States (HTSUS) at subheadings: 8716.39.0090 and 8716.90.5060. Imports of finished and unfinished chassis may also enter under HTSUS subheading 8716.90.5010. While the HTSUS subheadings are provided for convenience and customs purposes, the written description of the merchandise under investigation is dispositive. 3. This proceeding has been assigned case number C-549-855. 4. If there are any questions by the importing public regarding this message, please contact the Call Center for the Office of AD/CVD Operations, Enforcement and Compliance, International Trade Administration, U.S. Department of Commerce at (202) 482-0984. CBP ports should submit their inquiries through authorized CBP channels only. (This message was generated by OIX: CCC.) 5. There are no restrictions on the release of this information. Alexander Amdur

Frequently asked questions

What is CSMS 5084401?

CSMS 5084401 is a U.S. Customs and Border Protection (CBP) Cargo Systems Messaging Service bulletin titled "Initiation of countervailing duty investigation of certain chassis and subassemblies thereof from Thailand (C-549-855)". CSMS bulletins are the operational instructions CBP issues to brokers, importers, and ACE filers covering rate changes, system updates, scope guidance, and other day-to-day customs-operations changes.

When was CSMS 5084401 published?

CBP published CSMS 5084401 on March 25, 2025. The bulletin's instructions are typically operative as of the publication date unless the body specifies a different effective date.

Which AD/CVD cases does CSMS 5084401 affect?

CSMS 5084401 references 1 AD/CVD case (C-549-855). The links on this page take you to each linked order with its current scope, rates, and history.

Is the CBP CSMS the legally binding instruction?

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