Customs Notification No. 24/2011 dated 01.03.2011
Regarding exempts opper concentrates (26030000)

G.S.R. (E).- In exercise of the powers conferred by sub-section (1) of section 25 of the Customs Act, 1962 (52 of 1962), the Central Government, on being satisfied that it is necessary in the public interest so to do, hereby exempts copper concentrates falling under the tariff item 2603 00 00 of the First Schedule to the Customs Tariff Act, 1975(51 of 1975), when imported into India, from so much of the duty of customs as is equivalent to the duty of customs leviable on the value of gold and silver contained in such copper concentrate, subject to the condition that the importer produces to the Assistant Commissioner of Customs or Deputy Commissioner of Customs, as the case may be, an assay certificate from the mining company specifying separately, the value of gold and silver content in such copper concentrate. 

Illustration.- If the total value of copper concentrate is  100 and value of gold and silver in that copper concentrate is 40, basic customs duty shall be computed on the value of  60 only. However, the total value of  100 shall be taken into account, for the purposes of levy of additional duties of customs leviable under section 3 of the Customs Tariff Act, 1975. 

[F. No. 334/3/2011 - TRU]
(Sanjeev Kumar Singh)
Under Secretary to the Government of India