"THE new year will bring new powers to allow West Australian authorities to electronically monitor the state's most dangerous sex offenders.
Among several pieces of controversial new legislation to come into force in the state on January 1 or just after, electronic monitoring will become a standard condition of supervision orders for dangerous sexual offenders released from custody.
Electronic monitoring via a GPS system will also apply to dangerous sexual offenders who have already been released and are currently on supervision orders, with the new powers due to come into effect from February.
The $6 million system will only be used in Perth initially, with a regional phase-in scheduled later in the year."

http://www.theaustralian.com.au/news/breaking-news/gps-to-track-was-worst-sex-predators/story-fn3dxiwe-1226545344103