GST Refund amendment of section 54(8)(a) impact - Goods and Services Tax - GST

What shall be the impact Substitution by Central Goods and Services Tax (Amendment) Act, 2018 w.e.f. 01-02-2019 before it was read as zero-rated supplies in section 54(8)(a) of GST Act ? Earlier it read as: Section 54 (8) Notwithstanding anything contained in sub-section (5), the refundable amount shall, instead of being credited to the Fund, be paid to the applicant, if such amount is relatable to- (a) refund of tax paid on zero-rated suppliesof goods or services or both or on inputs or input services used in making such zero-rated supplies;.. It is substituted as: Section 54 (8) Notwithstanding anything contained in sub-section (5), the refundable amount shall, instead of being credited to the Fund, be paid to the applicant, if such amount is relatable to- (a) refund of tax paid on 1 [ export ] of goods or services or both or on inputs or input services used in making such 1 [ exports ] ; .. Please guide