Strata law requires that any major renovation be approved as a special resolution (ie, majority for, less than a quarter against) at a general meeting, any minor renovation be approved as a normal resolution at a general meeting (ie, a majority for, and some buildings have delegated this to the strata committee), and any cosmetic renovation does not require approval.
How is the split between major, minor and cosmetic defined? This seems to be a useful approach, if it can be defined clearly.
Please refer to Sections 109 and 110 of the Strata Schemes Management Act 2015 (NSW). There are lists of what is considered “cosmetic” or “minor renovation”.
You can google “Strata Schemes Management Act 2015” and find the NSW legislation web site.