Conversion of Section 74 Order to Section 73 - Goods and Services Tax - GST

Hello, Section 75(2) quotes as, (2) Where any Appellate Authority or Appellate Tribunal or court concludes that the notice issued under sub-section (1) of section 74 is not sustainable for the reason that the charges of fraud or any wilful-misstatement or suppression of facts to evade tax has not been established against the person to whom the notice was issued, the proper officer shall determine the tax payable by such person, deeming as if the notice were issued under sub-section (1) of section 73 Supposedly, an order u/s 74 has been issued for FY 2017-18 merely because it was time barred u/s 73 . By virtue of the above provision if at the appellate forums this order is converted to Section 73 , then would that mean - 1. Order will be treated as void ab initio because time limit under section 73 has already lapsed, thereby dropping demand for FY 2017-18? or 2. Will it be sustained through deeming fiction created by 75(2) and tax will continue to be recovered with penalty amount reduced to 10%? Thank you in advance!