If a convicted offender, due to his personal or financial circumstances, cannot be expected to pay the full fine immediately, the court shall allow a certain time for payment or allow payment in specified instalments. The court may also order that the privilege of paying the fine in fixed instalments will be revoked if the convicted offender fails to pay an instalment in time. The court shall also allow for such conditions of payment if without them the restitution by the offender of any damage caused by the offence were to be substantially impaired; the court may require the offender to present proof of restitution.