Anti-dumping duty continuation on Metronidazole extended after statutory review under Section 9A, amending prior customs notification. An amendment to the principal customs notification authorizes continuation of the anti-dumping duty on Metronidazole from China PR by inserting a provision that the duty shall remain in force for the extended period specified by the Government, subject to earlier revocation, following a continuation review requested and conducted under the statutory review procedure in the Customs Tariff framework.