19 CFR § 10.470 - Verification and justification of claim for preferential tariff treatment.
(a) Verification. A claim for preferential tariff treatment made under § 10.410 or § 10.442 of this subpart, including any statements or other information submitted to CBP in support of the claim, will be subject to such verification as the Center director deems necessary. In the event that the Center director is provided with insufficient information to verify or substantiate the claim, the Center director may deny the claim for preferential tariff treatment. A verification of a claim for preferential treatment may involve, but is not limited to, a review of:
(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.
(b) Applicable accounting principles. When conducting a verification of origin to which Generally Accepted Accounting Principles may be relevant, CBP will apply and accept the Generally Accepted Accounting Principles applicable in the country of production.