It is believed to be the first country in the world to put the legalisation of recreational cannabis to a national public vote.
New Zealand would join Canada and Uruguay on the list of countries legalising the sale and use of cannabis for adults if more than half of voters approved it.
The proposed law would legalise cannabis for people older than 20 – regulating how it is grown, used and sold – and the referendum question is non-binding; a “yes” vote means the next Parliament would have a mandate to pass it.
People would be allowed to buy 14g a day of cannabis under the proposed law, and grow two plants.
The bill includes advertising restrictions and a cap on how much of the market one company could dominate.