Extension of customs exemption period for lead glass used in manufacture of electrical lamp components continues import relief. Notification No. 220/86-Cus dated 24-3-1986 amends Notification No. 117/85-Customs by substituting a later expiry date in paragraph 2 to extend the temporary import duty exemption for lead glass tubings and rods imported for use in the manufacture of components for electrical lamps and fluorescent tubes.