Input tax credit entitlement governs claims, transfers and reversal obligations when registration status or taxability of supplies changes. Entitlement to input tax credit is granted to persons registered within the prescribed period, to those granted specific registration, and to persons ceasing composition liability, for inputs and inputs contained in stock on the day immediately preceding the relevant date; claims are subject to a one year invoice limitation, prescribed percentage reductions for capital goods where applicable, prescribed calculation methods, transfer of unutilised credit on business constitution changes, payment obligations on opting into composition or on exemption, and adjustment on supply of capital goods with a specified scrap exception.