Section 28. Claim of input tax credit and provisional acceptance thereof :

Every taxable person shall, subject to such conditions and restrictions as may be prescribed in this behalf, be entitled to take credit of input tax, as self-assessed, in his return and such amount shall be credited, on a provisional basis, to his electronic credit ledger to be maintained in the manner as may be prescribed:

Provided that a taxable person who has not furnished a valid return under section 27 of the Act shall not be allowed to utilize such credit till he discharges his self-assessed tax liability.