Answer first
Core rule
Answer first: check applicable Section and Chapter Notes, exclusions, and any specific provision for the article itself before using a parts provision. Absent special language or context, Additional U.S. Rule 1(c) covers products solely or principally used as a part, but a provision for parts or parts and accessories does not prevail over a specific provision for that part or accessory. Use the October 2026 exam's 2026 HTS Basic text; later current-law revisions require a separate live-law check.
Authority and lookup route
Locate the rule before returning to the facts. Links point to government or official publications.
Reference lookup task
For one machine component, find any specific heading for the component, read the applicable parts note, and only then inspect the machine's parts provision.
Route: Use the 2026 HTS Basic Edition in the order: legal notes → specific provision → parts provision → Additional U.S. Rule 1(c).
Worked example
A replacement electric motor is imported solely for a washing machine, but the HTSUS contains a specific provision for electric motors. Assume Section XVI Note 2(a) applies.
- 1Identify the imported article itself as an electric motor.
- 2Read Section XVI Note 2 before relying on the washing-machine parts provision.
- 3Locate the specific electric-motor provision and compare it with the generic parts language.
- 4Apply the rule that a parts provision does not prevail over a specific provision.
Conclusion: On the stated assumptions, classify under the specific electric-motor provision rather than automatically as a washing-machine part.
Common traps
- Assuming dedicated use automatically produces a parts classification.
- Ignoring a Section or Chapter Note that directs or excludes parts.
- Treating a useful or compatible accessory as a part without legal support.