19 U.S.C. § 1504
Section 1504 · Limitation on liquidation
Current version, with additions and removals from the December 8, 1994 version.
(1) Entries for consumption
(E) 1 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;
(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) of this section 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.