Prohibited Prizes The Gambling Act classifies gambling into 4 classes (other than gambling conducted by casinos and the New Zealand Lotteries Commission).Prohibited Gambling Excerpts of the Gambling Act 2003.Advertising Overseas Gambling Prohibited.In addition to this rule there are certain forms of gambling that are specifically prohibited under the Act: Gambling in New Zealand is illegal unless it is authorised by or under the Gambling Act 2003. Services › Casino and Non-Casino Gaming › Prohibited Gambling