Police will have powers to issue infringement notices to parents of children under 14 found walking the streets without supervision overnight, under National's youth offending policy.
Judges will be able to send the most serious youth offenders to an academy at Waiouru training camp for up to a year, Justice Minister Amy Adams has just announced.
They will get support there to address problems like addiction or a lack of literacy and numeracy skills, helping them lead better lives while keeping the public safe, she said.
"Those who fail to complete their time at the Academy will serve a commensurate adult sentence of imprisonment instead."
It is estimated that approximately 50 YSOs per year will be sent to the Junior Training Academy. $30 million over four years has been allocated to fund the YSO scheme.