He said while many of the matters explored in the new code of conduct went without saying, the high expectations of people within police needed to be articulated.
"It's also [about] the expectations of the public, and that's why we have made the document public.
"So whilst it's my and the police executive's expectations of how we will be professional in the service we provide, it is also really important that the public can understand and have their expectations very clear of their police service."
Mr Bush said police were "rightly" the most scrutinised organisation in the country.
"I'm all for that. People need to know exactly what's going on in the New Zealand police ... we are the New Zealand public's police service."