A Catholic school in Ponsonby has drawn criticism for erecting a billboard urging people to "say no" in an upcoming referendum on liberalising cannabis law.
In a photo uploaded on Reddit, a sign outside St Paul's College says: "To legalise is to normalise, say NO".
A Reddit user wrote: "Isn't it illegal for a high school to push political opinions on students?"
Other concerned readers have contacted the Herald saying the school shouldn't be pushing a political agenda on its school community.
According to the Ministry of Education's website, boards of trustees can allow billboards on school grounds for "general, not political, advertising" only.