The High Court has declined to rule on whether Climate Voter's website is election advertising but has reversed the classification of a separate Greenpeace campaign.
Climate Voter - a joint campaign by Greenpeace, Forest and Bird, Oxfam, WWF, 350 Aotearoa, and Generation Zero - asks people to sign up to vote in this year's general election based on candidates' and parties' climate change policy.
Nearly 60,000 people have signed up since the campaign's launch in June 2014 and the group has said over 13,000 people watched its political debate last week.
The Electoral Commission had advised the campaign that its website was election advertising, which would require it to comply with certain legal requirements.
It made the same decision for a separate Greenpeace campaign that used a parody version of Energy Minister Simon Bridges' website to oppose deep sea drilling.