Section 18 – Availability of credit in special circumstances :
(1) Subject to such conditions and restrictions as may be prescribed—
(a) a person who has applied for registration under this Act within thirty days from the date on which he becomes liable to registration and has been granted such registration shall be entitled to take credit of input tax in respect of inputs held in stock and inputs contained in semifinished or finished goods held in stock on the day immediately preceding the date from which he becomes liable to pay tax under the provisions of this Act;
(b) a person who takes registration under sub-section (3) of section 25 shall be entitled to take credit of input tax in respect of inputs held in stock and inputs contained in semi-finished or finished goods held in stock on the day immediately preceding the date of grant of registration;