Rescission of customs notification removes earlier exemption under the Customs Act by central government order. Rescission of a prior customs exemption notification is effected under the executive power conferred by section 25(1) of the Customs Act, 1962, with the Central Government rescinding Notification No. 258/90-Customs dated 23 October 1990 and recording the action by Notification No. 35/91-Cus. dated 20 March 1991.