Extension of customs exemption period for alpha pinene and turpentine by substituting the operative expiry date. Amendment of a customs exemption notification under sub section (1) of section 25 of the Customs Act, 1962: paragraph 2 of Notification No.19/85 Customs is amended by substituting the date '1st February, 1986' with '31st day of March, 1987,' thereby extending the period of the exemption applicable to alpha pinene and turpentine.