159. (1) In Schedule III to the Central Goods and Services Tax Act, paragraphs 7 and 8 and the Explanation 2 thereof (as inserted vide section 32 of Act 31 of 2018) shall be deemed to have been inserted therein with effect from the 1st day of July 2017.

(2) No refund shall be made of all the tax which has been collected, but which would not have been so collected, had sub-section (1) been in force at all material times.