Duty exemption for bonded-warehouse manufactured machinery limited to excess over duty on like imported articles at clearance. Exemption applies to aluminium articles of specified tariff items manufactured in a warehouse under the Manufacture in Customs Bond (General) Rules, 1960 and cleared for home consumption; duty is remitted to the extent that the duty on imported aluminium used in manufacture exceeds the duty leviable at the date of clearance on like imported articles.