Local councils will be enforcing new alcohol legislation that requires bars to close earlier and places restrictions on the sale of liquor at bottle stores and supermarkets.
The Sale and Supply of Alcohol Act, passed last year, comes into effect from midnight on Tuesday.
Under the legislation, the latest possible closing hour for bars and pubs will be 4am and supermarkets and bottle stores will not able to sell alcohol from 11pm to 7am.
The revised definition of intoxication lists indicators including slurred speech, spilling drinks, stumbling or tripping, being aggressive or rude, or indulging in seriously inappropriate behaviour.
A person displaying such traits can be removed from a licensed premises. Local councils are responsible for enforcing the new law.