19 U.S.C. § 1504

(a) Liquidation (1) Entries for consumption Unless an entry of merchandise for consumption is extended under subsection (b) of this section or suspended as required by statute or court order, except as provided in section 1675(a)(3) of this title , an entry of merchandise for consumption not liquidated within 1 year from— (A) the date of entry of such merchandise, (B) the date of the final withdrawal of all such merchandise covered by a warehouse entry, (C) the date of withdrawal from warehouse of such merchandise for consumption if, pursuant to regulations issued under section 1505(a) of this title , duties may be deposited after the filing of any entry or withdrawal from warehouse, (D) if a reconciliation is filed, or should have been filed, the date of the filing under section 1484 of this title or the date the reconciliation should have been filed, whichever is earlier; or (E) 1 1 See 2004 Amendment notes below. if a reconfigured entry is filed under an import activity summary statement, the date the import activity summary statement is filed or should have been filed, whichever is earlier; shall be deemed liquidated at the rate of duty, value, quantity, and amount of duties asserted by the importer of record. Notwithstanding section 1500(e) of this title , notice of liquidation need not be given of an entry deemed liquidated. (2) Entries or claims for drawback (A) In general Except as provided in subparagraph (B) or (C), unless an entry or claim for drawback is extended under subsection (b) or suspended as required by statute or court order, an entry or claim for drawback not liquidated within 1 year from the date of entry or claim shall be deemed liquidated at the drawback amount asserted by the claimant or claim. Notwithstanding section 1500(e) of this title , notice of liquidation need not be given of an entry deemed liquidated. (B) Unliquidated imports An entry or claim for drawback whose designated or identified import entries have not been liquidated and become final within the 1-year period described in subparagraph (A), or within the 1-year period described in subparagraph (C), shall be deemed liquidated upon the deposit of estimated duties on the unliquidated imported merchandise, and upon the filing with the Customs Service of a written request for the liquidation of the drawback entry or claim. Such a request must include a waiver of any right to payment or refund under other provisions of law. The Secretary of the Treasury shall prescribe any necessary regulations for the purpose of administering this subparagraph. (C) Exception An entry or claim for drawback filed before December 3, 2004 , the liquidation of which is not final as of December 3, 2004 , shall be deemed liquidated on the date that is 1 year after December 3, 2004 , at the drawback amount asserted by the claimant at the time of the entry or claim. (3) Payments or refunds Payment or refund of duties owed pursuant to paragraph (1) or (2) shall be made to the importer of record or drawback claimant, as the case may be, not later than 90 days after liquidation. (b) Extension The Secretary of the Treasury may extend the period in which to liquidate an entry if— (1) the information needed for the proper appraisement or classification of the imported or withdrawn merchandise, or for determining the correct drawback amount, or for ensuring compliance with applicable law, is not available to the Customs Service; or (2) the importer of record or drawback claimant, as the case may be, requests such extension and shows good cause therefor. The Secretary shall give notice of an extension under this subsection to the importer of record or drawback claimant, as the case may be, and the surety of such importer of record or drawback claimant. Notice shall be in such form and manner (which may include electronic transmittal) as the Secretary shall by regulation prescribe. Any entry the liquidation of which is extended under this subsection shall be treated as having been liquidated at the rate of duty, value, quantity, and amount of duty asserted by the importer of record, or the drawback amount asserted by the drawback claimant, at the expiration of 4 years from the applicable date specified in subsection (a). (c) Notice of suspension If the liquidation of any entry is suspended, the Secretary shall by regulation require that notice of the suspension be provided, in such manner as the Secretary considers appropriate, to the importer of record or drawback claimant, as the case may be, and to any authorized agent and surety of such importer of record or drawback claimant. (d) Removal of suspension Except as provided in section 1675(a)(3) of this title , when a suspension required by statute or court order is removed, the Customs Service shall liquidate the entry, unless liquidation is extended under subsection (b), within 6 months after receiving notice of the removal from the Department of Commerce, other agency, or a court with jurisdiction over the entry. Any entry (other than an entry with respect to which liquidation has been extended under subsection (b)) not liquidated by the Customs Service within 6 months after receiving such notice shall be treated as having been liquidated at the rate of duty, value, quantity, and amount of duty asserted by the importer of record or (in the case of a drawback entry or claim) at the drawback amount asserted by the drawback claimant.