Probation violation guidelines; use of sentencing revocation report and discretionary sentencing guidelines in revocation proceedings. Authorizes the Virginia Sentencing Commission to develop, maintain, and modify a system of statewide discretionary sentencing guidelines for use in hearings conducted in circuit courts in which the defendant is cited for violation of a condition or conditions of supervised probation imposed as a result of a felony conviction. The bill provides that a court would be presented with such guidelines when a defendant is cited for violating a condition or conditions of supervised probation imposed as a result of a felony conviction and such person is under the supervision of a state probation and parole officer.