High risk offenders will be fitted with GPS-equipped ankle bracelets so authorities can monitor their movements around the clock, Government has announced.
Corrections Minister Anne Tolley said the ankle bracelets will notify Corrections staff if paroled offenders stray into "exclusion zones" such as parks and schools.
They will be introduced in August, with 11 child sex offenders on parole with special conditions fitted in the initial launch.
That number was planned to rise to up to 90 by the end of the year and up to 200 in 2013.
Corrections has asked the Parole Board to order high profile rapist Stewart Murray Wilson, known as the "Beast of Blenheim", to wear a GPS bracelet following his release from jail in September.