StacksVerified U.S. regulatory reference

19 CFR §141.87

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
Whenever the classification or appraisement of merchandise depends on the component materials, the invoice shall set forth a breakdown giving the value, weight, or other necessary measurement of each component material in sufficient detail to determine the correct duties.