“It is clear and reiterated that the term of imprisonment in default of payment of fine is not a sentence. To put it clear, it is a penalty which a person incurs on account of nonpayment of fine. On the other hand, if sentence is imposed, undoubtedly, an offender must undergo unless it is modified or varied in part or whole in the judicial proceedings. However, the imprisonment ordered in default of payment of fine stands on a different footing. When such default sentence is imposed, a person is required to undergo imprisonment either because he is unable to pay the amount of fine or refuses to pay such amount. Accordingly, he can always avoid to undergo imprisonment in default of payment of fine by paying such an amount. In such circumstance, we are of the view that it is the duty of the Court to keep in view the nature of offence, circumstances in which it was committed, the position of the offender and other relevant considerations such as pecuniary circumstances of the accused person as to character and magnitude of the offence before ordering the offender to suffer imprisonment in default of payment of fine. The provisions of Sections 63 to 70 of IPC make it clear that an amount of fine should not be harsh or excessive. We also reiterate that where a substantial term of imprisonment is inflicted, an excessive fine should not be imposed except in exceptional cases.”