The Supreme Court has declared the minimum voting age of 18 years old is unjustifably inconsistent with the New Zealand Bill of Rights Act.

The advocacy group, "Make it 16 Inc" sought judicial declarations that local and national voting age restrictions were inconsistent with the right to be free from age discrimination, as affirmed in the New Zealand Bill of Rights Act.

Despite the verdict - only Parliament can lower the voting age, and the declaration must go to the House within a week for further consideration.

Make it 16 campaign co-director Caeden Tipler spoke to Māni Dunlop about the result.