Sure there's a policy.  From the Department of Public Safety, effective April 21, 2010:

"PURPOSE

To establish an electronic method of monitoring in-community offenders awaiting court adjudication who are participating in an intermediate sanction or an alternative to incarceration program.  This method is open to other offenders who may benefit from closer monitoring when in a community program.  Including those on pretrial release, furlough, probation, and parole."

Note that there is an implication that discretion can be used to determine who is eligible.