Classification hinges on the vehicle's primary designed function. If the vehicle is purpose-built for a specific industrial or service task — such as concrete mixing, aerial work, or fire suppression — and that function is integral to the vehicle's structure, it typically falls under special purpose classifications. A standard truck body with bolt-on equipment may instead classify as a truck with accessories. A binding ruling from CBP is advisable for borderline cases.

Depending on the country of origin and the corresponding HTS subheading, imports may be subject to Section 301 tariffs or other trade-remedy measures. Because this SITC heading maps to multiple HTS lines with varying duty treatment, importers should confirm the applicable measures at the 10-digit HTS level before entry.