No interest on AED(GSI) due to retro-amendment denying credit if credit was paid or reversed in time

Cenvat Credit : Even in case of retrospective amendment barring use of credit of AED(GSI) accrued prior to 1-4-2000 for payment of BED, interest on credit used in contravention of said bar would be payable from date of wrong utilization, not from date of such retrospective amendment