(1) "zero rated supply" means any of the following supplies of goods or services or both, namely:--
         (a) export of goods or services or both; or
         (b) supply of goods or services or both ¹[for authorised operations] to a Special Economic Zone developer or a Special Economic Zone unit.
     (2) Subject to the provisions of sub-section (5) of section 17 of the Central Goods and Services Tax Act, credit of input tax may be availed for making zero-rated supplies, notwithstanding that such supply may be an exempt supply.
     ²[(3) A registered person making zero rated supply shall be eligible to claim refund of unutilized input tax credit on supply of goods or services or both, without payment of integrated tax, under bond or Letter of Undertaking, in accordance with the provisions of section 54 of the Central Goods and Services Tax Act or the rules made thereunder, subject to such conditions, safeguards and procedure as may be prescribed:
    Provided that the registered person making zero rated supply of goods shall, in case of non-realisation of sale proceeds, be liable to deposit the refund so received under this sub-section along with the applicable interest under section 50 of the Central Goods and Services Tax Act within thirty days after the expiry of the time limit prescribed under the Foreign Exchange Management Act, 1999 (42 of 1999) for receipt of foreign exchange remittances, in such manner as may be prescribed.
    (4) The Government may, on the recommendation of the Council, and subject to such conditions, safeguards and procedures, by notification, specify-
        (i) a class of persons who may make zero rated supply on payment of integrated tax and claim refund of the tax so paid;
        (ii) a class of goods or services which may be exported on payment of integrated tax and the supplier of such goods or services may claim the refund of tax so paid.]