Rescission of customs notification revokes a previously granted exemption under section 25(1) of the Customs Act. Rescission of a prior customs exemption notification is effected by exercise of the executive power under section 25(1) of the Customs Act, 1962 upon a satisfaction of necessity in the public interest, withdrawing Notification No. 177/83 Customs and terminating the earlier miscellaneous exemption so ordinary tariff application is restored.