Section 89(4B)(b) in The Central Goods and Services Tax Rules, 2017
(b)availed the benefit of notification No. 78/2017-Customs, dated the 13th October, 2017, published in the Gazette of India, Extraordinary, Part II, Section 3, Sub-section (i), vide number G.S.R 1272(E), dated the 13th October, 2017 or notification No. 79/2017-Customs, dated the 13th October, 2017, published in the Gazette of India, Extraordinary, Part II, Section 3, Sub-section (i), vide number G.S.R 1299(E), dated the 13th October, 2017,