A loophole meant that could not currently happen.
"We will also introduce a contestable fund of $30 million over four years for community groups to support programmes to reduce offending, because we know local solutions are often the best, and we want to give smaller or rural communities the opportunity to take further action," Adams said.
Green leader James Shaw said the measures were like a police state.
Labour justice spokesman Andrew Little said boot camps did not work. They turned young criminals into fit young criminals.
"National's policy is simply a desperate headline-grabbing response to a problem the Government has created through their underfunding of Police for nine years.
"Boot camps and infringement notices for parents are simply draconian and counterproductive.
They won't make a difference. They are punishing parents when what we need are new ways of intervening early on with families who have challenging situations."
"National are the worst re-offenders in youth crime," the headline of his press statement said.
Act leader David Seymour said National had previously announced a boot camp policy - John Key in 2008 in Opposition - and the party had failed because National did not want to commit to addressing youth crime beyond slogans.
"If National can't even break their own cycle of behaviour, how can they hope to break the cycle of failed families and youth offenders who cause so much damage to New Zealand society?"
The policy was applauded by the Sensible Sentencing Trust.