Input Tax Credit clarification: ITC credited for deemed exports is not treated as Chapter V ITC and excluded from apportionment rules. Tax paid on supplies treated as deemed exports has been credit ed to recipients solely to enable portal refunds and is not ITC under Chapter V; consequently it is not subject to section 17 apportionment/reversal nor included in 'Net ITC' for refund computations. The proviso to clause (b) of subsection (5) applies to the entire clause, making credit available where employer provision is legally obligatory. 'Leasing' in blocked credits refers only to motor vehicles, vessels and aircraft. Employer perquisites under employment contracts are not taxable supplies. Electronic credit ledger funds may be used only for output tax (excluding reverse charge) and not for interest, penalties or cash refunds; electronic cash ledger may meet tax and other liabilities.