Electronic cash and credit ledger governs payment and utilisation of tax credits under prescribed hierarchy and conditions. Deposits by prescribed electronic modes are credited to the electronic cash ledger and self-assessed input tax credit to the electronic credit ledger, both maintained as prescribed. Cash ledger balances may pay tax, interest, penalty, fees or other amounts; credit ledger balances may pay output tax under this Act or the Integrated Act, subject to prescribed conditions and time. Surplus balances may be refunded under the Act. The section prescribes a utilisation hierarchy among integrated, central, State and Union territory tax credits, restrictions on cross-utilisation, a discharge sequence for dues, and records in an electronic liability register.