Input tax credit entitlement may be claimed for stock, semi finished goods and capital goods subject to prescribed conditions. Availability of input tax credit is provided for persons registering within prescribed timeframes, for those moving from a composition scheme to normal tax, and where exempt supplies become taxable; credits may be claimed for inputs, inputs in semi finished or finished goods and capital goods held immediately before the change, subject to prescribed reductions on capital goods, time limits, calculation rules, transfer mechanics on change of business constitution, and mandated debit payments to electronic ledgers with any unpaid balance lapsing.