Section 140(3) in The Punjab Goods and Services Tax Act, 2017
(3)A registered person, who was not liable to be registered under the existing law or who was engaged in the sale of exempted goods or tax free goods, by whatever name called, or goods which have suffered tax at the first point of their sale in the State and the subsequent sales of which are not subject to tax in the State under the existing law but which are liable to tax under this Act or where the person was entitled to the credit of input tax at the time of sale of goods, if any, shall be entitled to take, in his electronic credit ledger, credit of the value added tax in respect of inputs held in stock and inputs contained in semi-finished or finished goods held in stock on the appointed day subject to the following conditions, namely:-(i)such inputs or goods are used or intended to be used for making taxable supplies under this Act;(ii)the said registered person is eligible for input tax credit on such inputs under this Act;(iii)the said registered person is in possession of invoice or other prescribed documents evidencing payment of tax under the existing law in respect of such inputs; and(iv)such invoices or other prescribed documents were issued not earlier than twelve months immediately preceding the appointed day:Provided that where a registered person, other than a manufacturer or a supplier of services, is not in possession of an invoice or any other documents evidencing payment of tax in respect of inputs, then, such registered person shall, subject to such conditions, limitations and safeguards as may be prescribed, including that the said taxable person shall pass on the benefit of such credit by way of reduced prices to the recipient, be allowed to take credit at such rate and in such manner as may be prescribed.