In exercise of the powers conferred by sub-section (1) of section 25 of the Customs Act/1962 (52 of 1962), the Central Government, being satisfied that it is necessary in the public interest so to do, hereby exempts goods of the description specified in column (2) of the Table annexed hereto when imported into India by an importer specified in column (3) of the said Table from so much of the duty of customs leviable thereon which is specified in the First Schedule to the Customs Tariff Act, 1975 (51 of 1975) as is in excess of the amount calculated at the rate specified in the corresponding entry in column (4) of the said Table and the whole of the additional duty leviable thereon under section 3 of the said Customs Tariff Act, subject to the following conditions, namely.