Without prejudice to the operation of section 396(2) of this Act, where a court of summary jurisdiction has imposed a fine on an offender, the court may, of its own accord or on the application of the offender, order payment of that fine by instalments of such amounts and at such time as it may think fit, and it shall be the duty of the court to inform the offender of his right to make an application as aforesaid.

Where any instalment is not paid by the time so ordered, the offender shall, subject to the provisions of the last foregoing section, be deemed to be in default of payment of a fine of the amount of the unpaid balance and dealt with accordingly, and where the court has already imposed imprisonment in default of payment the offender shall be liable to be imprisoned for a period that bears to the period of imprisonment so imposed the same proportion, as nearly as may be, as the amount of the unpaid balance bears to the total amount of the fine.