Auxiliary duty amendment inserts new Schedule entry, modifying customs exemption notification and invoking Customs Act powers. The Central Government amends Notification No. 312/86-Customs by inserting, after Sl. No. 263, a new Schedule entry Sl. No. 264 referencing Notification No. 335/86-Customs dated 5-6-1986, exercising powers under the Customs Act and the Finance Act to modify the Schedule of miscellaneous exemption notifications.