§ 1504.
(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the information needed for the proper appraisement or classification of the imported or withdrawn merchandise, or for determining the correct drawback amount, or for ensuring compliance with applicable law, is not available to the Customs Service; or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).
([June 17, 1930, ch. 497], title IV, § 504, as added [Pub. L. 95–410, title II, § 209(a)], Oct. 3, 1978, [92 Stat. 902]; amended [Pub. L. 98–573, title I, § 191(d)], Oct. 30, 1984, [98 Stat. 2971]; [Pub. L. 103–182, title VI, § 641], Dec. 8, 1993, [107 Stat. 2204]; [Pub. L. 103–465, title II, § 220(c)], Dec. 8, 1994, [108 Stat. 4865]; [Pub. L. 104–295, § 3(a)(7)], Oct. 11, 1996, [110 Stat. 3516]; [Pub. L. 108–429, title I, § 1563(e)], title II, § 2102, Dec. 3, 2004, [118 Stat. 2585], 2597.)