19 C.F.R. § 10.217
(a) Verification by CBP. A claim for preferential treatment made under § 10.215, including any statements or other information contained on a Certificate of Origin submitted to CBP under § 10.216, will be subject to whatever verification the Center director deems necessary. In the event that the Center director for any reason is prevented from verifying the claim, the Center director may deny the claim for preferential treatment. A verification of a claim for preferential treatment may involve, but need not be limited to, a review of:
(b) Importer requirements. In order to make a claim for preferential treatment under § 10.215, the importer: