unless waived in whole or in part by the court, board or commissioner, and may be any greater amount as established by the court or board. This fee shall be considered a condition of release, and failure to satisfy this obligation shall be grounds for a violation hearing, unless the probationer or parolee has been found to be indigent and, for that reason, unable to pay the fee. 

him for a revocation of any unpaid portion of the restitution. If the court finds that the circumstances which warranted the imposition of the restitution have changed, or that it would otherwise be unjust to require payment, the court may revoke the unpaid portion of the restitution in whole or in part, or modify the time and method of payment.

§ 19.2-354, unless the defendant shows that his default was not attributable to an intentional refusal to obey the sentence of the court, or not attributable to a failure on his part to make a good faith effort to obtain the necessary funds for payment, or unless the defendant shows that any failure to appear was not attributable to an intentional refusal to obey the order of the court, the court may order the defendant confined as for a contempt for a term not to exceed sixty days or impose a fine not to exceed $500. The court may provide in its order that payment or satisfaction of the amounts in default at any time will entitle the defendant to his release from such confinement or, after entering the order, may at any time reduce the sentence for good cause shown, including payment or satisfaction of such amounts. C. If it appears that the default is excusable under the standards set forth in subsection B hereof, the court may enter an order allowing the defendant additional time for payment, reducing the amount due or of each installment, or remitting the unpaid portion in whole or in part.