CENVAT credit reversal where credited inputs are removed, written off, or subject to duty remission, with repayment and recovery rules. Rule 4 requires payment equal to CENVAT credit when inputs on which credit was taken are removed as such, written off in accounts, or when duty on finished goods is remitted; such payments are to be made by debiting CENVAT credit or otherwise within the prescribed monthly timeframes, recoverable under rule 16 if unpaid, and payments made under the removal provision are eligible for CENVAT credit as if duty were paid by the remover.