Code of Federal Regulations Title 19. Customs Duties § 19.10.470 Verification and justification of claim for preferential tariff treatment

(1) All records required to be made, kept, and made available to CBP by the importer or any other person under part 163 of this chapter;

(2) Documentation and other information regarding the country of origin of an article and its constituent materials, including, but not limited to, production records, supporting accounting and financial records, information relating to the place of production, the number and identification of the types of machinery used in production, and the number of workers employed in production;  and

(3) Evidence that documents the use of U.S. or Chilean materials in the production of the article subject to the verification, such as purchase orders, invoices, bills of lading and other shipping documents, customs import and clearance documents, and bills of material and inventory records.