Extension of customs concession periods: exemptions for inputs to oxoalcohol manufacture are extended to the next year-end. Extension of customs concession periods for specified inputs used in oxoalcohol manufacture: the Central Government amends Notifications Nos. 19/85-Cus., 50/87-Cus. and 52/87-Cus. by substituting the earlier March 1988 expiry wording in paragraph 2 of each notification with the 31st day of March, 1989, thereby continuing existing concessions on alpha pinene and turpentine, soda ash and specified olefins for oxoalcohols in the public interest.