While no dementia specific legislation exists regarding discrimination, the Human rights act 1993 (Legislation 3, 1993) and the NZ Bill of Rights Act (Parliamentary Counsel Office, 2013) prohibit discrimination on the grounds of disability (which includes intellectual or psychological disability and any other loss or abnormality of psychological or physiological structure or function).

References:

Legislation 3. (1993). Human Rights Act. Available from: http://www.legislation.govt.nz/act/public/1993/0082/latest/DLM304475.html.

Parliamentary Counsel Office. (2013). New Zealand Bill of Rights Act 1990. New Zealand Legislation website. Available from: http://www.legislation.govt.nz/act/public/1990/0109/latest/DLM224792.html.