Transitional input tax credit rules require cash refunds or carryforward treatment while disallowing pre appointed reversals. Transitional provisions prescribe that refunds and disposal of claims, appeals and proceedings initiated under the prior law shall be governed by that law, with refundable amounts paid in cash and rejected or recovered amounts not admissible as input tax credit under the new Act; returned goods and contract price revisions permit specified refund, invoice and credit/debit note treatments; input tax credit reversed before the appointed day is inadmissible and carryforward balances preclude refunds; agents may claim credit for principal's goods subject to registration, stock declaration, invoice recency and reversal conditions.