This discussion paper gives stakeholders the opportunity to review and comment on options for a wholesale gas market in New Zealand. A series of options are described at a conceptual level and evaluated according to criteria agreed between Gas Industry Co and the Wholesale Market Working Group. Submissions on this document will be used to assist in selecting an option for further development. The supplementary note addresses Section 41 of the Crown Minerals Act 1991, which may or may not have an effect on the design of the wholesale market.