Police may support local authorities and other groups wanting to install closed circuit television cameras in public places for crime prevention purposes. The objective of installing the cameras is to reduce the incidence of crime and disorder, so members of the community feel safe when visiting the public areas covered by the cameras.
Crime prevention cameras are not used to maintain surveillance on individuals or groups – they are to prevent and detect criminal offences in identified high crime areas. Cameras are used for the deterrence or immediate detection of criminal offences and must be operated in a manner that complies with the Privacy Act 1993 and this policy.
This policy applies to crime prevention cameras installed at fixed sites in public places for a general crime prevention purpose and operated in conjunction with police. It also applies to significant expansions of existing crime prevention camera systems and to trials of new systems.
Read full article here -> http://www.police.govt.nz/about-us/publication/crime-prevention-cameras-cctv-public-places-policy/part-1