Power not to recover Goods and Services Tax not levied or short levied as a result of general practice

After section 11 of the Principal Act the following section shall be inserted, namely: - "11A. Notwithstanding anything contained in this Act, if the Government is satisfied that- (a) a practice was, or is, generally prevalent regarding levy of State tax (including non-levy thereof) on any supply of goods or services or both; and (b) such supplies were, or are, liable to, - (i) State tax, in cases where according to the said practice, State tax was not, or is not being, levied, or (ii) a higher amount of State tax than what was, or is being, levied, in accordance with the said practice, the Government may, on the recommendation of the Council, by notification in the official Gazette, direct that the whole of the State tax payable on such supplies, or, as the case may be, the State tax in excess of that payable on such supplies but for the said practice, shall not be required to be paid in respect of the supplies on which the State tax was not or is not being levied, or was, or is being, short-levied, in accordance with the said practice."