(1) In the case of a sale in the course of export under section 5 of the Central Sales Tax Act 1956; (74 of 1956) or sale of any input made to any dealer in a special economic zone outside the customs territory of India; or sale (including sale out side India and Domestic Tariff Area) by an export oriented unit, there shall be no tax payable on the turnover of such sale and the person exporting the goods or selling them shall be entitled, in the manner prescribed, to a credit of input tax paid-

(a) on the purchase of the goods sold in the course of export (excluding sale to Domestic tariff Area) or purchase of goods sold to any dealer in the special economic zone or sale (including sale outside India and Domestic Tariff Area) by an export oriented unit; or

(b) on the purchase of inputs and capital assets which have been used for the manufacture of goods sold in the course of export (excluding sale of Domestic Tariff Area) or to any dealer in the special economic zone;

Provided that the input tax credit on account of capital assets shall be allowed only to the extent and in the manner prescribed.

(2) Notwithstanding anything to the contrary contained in the Act, sale of goods to the organizations specified in Schedule V to this Act shall be exempt from tax:

Provided that no such sale shall be exempt from tax unless the person making the purchase on behalf of the organization specified in Schedule V affixes his signature with his full name, designation along with the name of the organization and date of purchase on the invoice issued in respect of the said sale.