“9. The reasons for such a stiff and stringent provision, are not far to guess. As can be seen from the scheme of Sections 11A, 11AA, 11AB and 11AC of the Act. It is evident that Section 11A prescribes procedure for recovery of duties not levied or not paid, or short-levied or short-paid, or erroneously refunded. Sub-Section (1) within itself and within its proviso covers the cases of duty not paid/ short paid in absence of mens rea or with intention. Section 11A(2) prescribes interest on delayed payment of the duty, in cases where, in spite of determination under Section 11A(2), the duty so determined is not paid within three months. Interest on delayed payment of duty, as can be charged under Section 11AB, is chargeable in both the cases, i.e., evasion of duty without, mens rea and wild intention to evade. It can be said that interest chargeable under Section 11AB, is a sort of civil liability imposed upon assessee for retaining the amount to which revenue was entitled, with him and utilizing the same, instead of allowing the same to come into the State coffer. Section 11AC is applicable only to those cases, where there is evasion of duty intentionally, by fraud, collusion or willful misstatement or suppression of facts. It may not be erroneous to say that penalty under Section 11AC is a sort of penal provision and, therefore, the said provision is harsh and stringent. The person, who deliberately evades the duty, is required