The Citizen Initiated Referenda Act 1993
http://www.justice.govt.nz/publications/publications-archived/2001/the-citizen-initiated-referenda-act-1993/publication
Stage 1 - Starting a Referendum
To start a referendum, give your written proposal to the Clerk of the House of Representatives. The proposal must include:
- your name
- the name of your contact representative or spokesperson (if you have one)
- a contact address for you or your representative or spokesperson (if you have one)
- a draft of the proposed wording for the petition
- a draft of the petition collection form.
You must also give the Clerk the $500 fee.