Customs tariff amendment: substituted concessional duty rate for a specified serial item in the exemptions table. Amendment to Notification No.21/2002 Customs substitutes the entry in column (4) against table Serial No. 585 to reflect a revised effective duty rate of 10% under the authority of Section 25 of the Customs Act, 1962, thereby modifying the table of exemptions and effective basic and additional duties for specified goods of Chapters 1 to 99.