Customs duty recovery may continue after levy notifications...

Customs duty recovery may continue after levy notifications expire where liability accrued on importation, but valid Advance Authorisations supported by unrevoked export-obligation discharge and redemption certificates confer exemption from countervailing and anti-dumping duties. Product-specific trade-remedial duty on alleged castings requires component-wise proof that the goods retain the essential character of castings; intended end use is insufficient. Extended limitation requires collusion, wilful misstatement or suppression intended to evade duty, and prior departmental knowledge defeats that basis. Demands beyond the statutory outer limit are time-barred.