Billboards attacking Green Party MP Tamatha Paul have appeared in Auckland and Wellington.
The billboards, which resemble Green Party campaign hoardings, contain the slogans "Defund the Police" and "Vote Green". The Sensible Sentencing Trust is behind the campaign - attributed at the very bottom of the billboards, in very small font.
A spokesperson for the Electoral Commission confirmed the Green Party had contacted the Commission about the advertisements, but in the Commission's view, the billboards complied with the Electoral Act.
So when do attack ads cross the line? To help us answer that question, Nights is joined by Professor Andrew Geddis from the University of Otago's Faculty of Law.
Sensible Sentencing Trust's billboards on Whitmore St. Photo: RNZ/Giles Dexter