19 CFR § 10.590
Right to make post-importation claim and refund duties
July 16, 2020
Notwithstanding any other available remedy, where a good would have qualified as an originating good when it was imported into the United States but no claim for preferential tariff treatment was made, the importer of that good may file a claim for a refund of any excess duties at any time within one year after the date of importation of the good in accordance with the procedures set forth in §10.591 of this subpart. Subject to the provisions of §10.588 of this subpart, CBP may refund any excess duties by liquidation or reliquidation of the entry covering the good in accordance with §10.592(c) of this subpart.