Young people can use the PDLA scheme – there’s no minimum age.
Oranga Tamariki Act 1989, ss 215-218
If you’re under 18, and the police want to question you about an offence they suspect you’ve committed, they must first explain that you have:
the right to talk to a lawyer, and
the right to see a nominated adult, which can be either a parent or another adult of your choice.
You have the right to talk privately with the lawyer and with your nominated adult.
The police must also contact your parents or caregivers to tell them that you’re being questioned or have been arrested.