Still over a year to go, but I assume there are a few tragics like me who are involved on club committees, and I'm guessing that most of them would be incorporated societies.
The history is that the Incorporated Societies Act 1908 is finally being replaced by the Incorporated Societies Act 2022. Clubs (and regional/national sports orgs) are required to reregister as an incorporated society by 5 April 2026. Failure to reregister means automatically being deregistered, requiring said clubs to cease operating and be wound up.
The main part of reregistration is agreeing to a modified or new constitution and regulations/bylaws.
Some useful information and resources (including templates) are available courtesy of Sport NZ: https://sportnz.org.nz/resources/incorporated-societies-act-2022-and-regulations/
www.societies.govt.nz is the official page of the Ministry of Business, Innovation and Employment (MBIE), which is the government department responsible for incorporated societies (the Companies Office is the part of MBIE that administers all of this). Being the regulator, that page has some good resources and information.
Law firm Parry Field also has a very good information hub online with resources, explanations and occasional webinars (and recordings): https://www.parryfield.com/home/blogs/resources-for-the-incorporated-societies-act-2022/
Not sure how useful that is for anyone, but I've been helping a few places with this, so happy to answer questions (to a point).
Edit: fixed typos