Notification amendment alters commencement date for Fabrics Additional Duty Rules, substituting an earlier start with a later one. The Central Government, invoking powers under the Customs Act and the Customs Tariff Act, amends Notification No. 47/96-Customs (Fabrics (Additional Duty) Rules) by substituting the commencement date specified in the proviso with a later date, thereby changing the effective date stated in the original notification.