Tariff amendment replaces unit rate for a specified customs item under the Customs Act, revising the notified per unit charge. The Central Government, under section 25(1) of the Customs Act, 1962, amends Notification No. 124/86-Customs by substituting, in the Table against Sl. No. 5, the entry in column (4) with a new per kilogram rate, thereby revising the notified unit charge applicable to that tariff entry.