Customs tariff amendment: substitution of tariff entry for serial number four under the existing notification update. The Central Government has amended Notification No.21/2002 Customs by substituting, in the Table against S. No. 4, the entry in column (2) with the tariff designation '0406.90'; the change is effected by Notification No.52/2002 Customs under the powers of sub section (1) of section 25 of the Customs Act, 1962 as a further modification to the principal notification.