You need to know that enforcement officers must show their identity card when asked. They have to prove who they are when you ask to see their card. This rule is part of the Anti-Money Laundering and Countering Financing of Terrorism Act 2009, but it was repealed on 30 June 2013 by the Search and Surveillance Act 2012, which can be found at https://legislation.govt.nz/act/public/1986/0120/latest/link.aspx?id=DLM4355905.