Input tax credit eligibility on pre-registration stock is limited to the prescribed cut-off date before registration. Eligibility for input tax credit on inputs held in stock is governed by a prescribed cut-off date; for a person liable on 1 August 2017 and registered on 15 August 2017, the cut-off for claiming credit on inputs held in stock is 31 July 2017, so only inventory as on that pre-registration date qualifies.