Police are targeting violence, drink-driving, and liquor bans over the weekend of 3-4 December, as part of a trans-Tasman operation tackling alcohol-fuelled crime.
It is the fifth time police in New Zealand and Australia have combined efforts in a campaign called Operation Unite.
There will be extra police on duty at breath-test checkpoints, and mobile testing stations in rural areas.
For the first time, police in Bay of Plenty will be using the social networking site Twitter to tell people about incidents they attend.
Licensed premises and liquor bans will be the focus in Canterbury, while in the lower North island police will be focusing on violence arising out of alcohol use.
The operation, which started at 6pm on Friday, runs until 6am on Sunday.