Disposition of a violation of section 3802 to attend a treatment program for alcohol or drug addiction must successfully complete all requirements of the treatment program ordered by the court before the defendant's operating privilege may be restored. Successful completion of a treatment program includes the payment of all court-imposed fines and costs, as well as fees to be paid to the treatment program by the defendant. For the purposes of restoring a suspended license, being current on a payment plan shall be considered as a part of a successfully completed program. If a defendant fails to successfully complete the requirements of a treatment program, the suspension shall remain in effect until the defendant completes the program and is otherwise eligible for restoration of his operating privilege. The treatment agency shall immediately notify the court of successful completion of the treatment program. The final decision as to whether a defendant has successfully completed the treatment program rests with the court.