Extension of exemption period for coal tar pitch: prior customs notification's expiry date is postponed by one year. Amendment to Notification No. 333/86 Customs substitutes the date in paragraph 2, altering the expiry from 31st May, 1987 to 31st May, 1988 for the exemption applicable to coal tar pitch (Chapter 27), under powers conferred by sub section (1) of section 25 of the Customs Act, 1962.