James79 – You are partly right and partly wrong. See the link below for what approvals are required for the 3 categories of renovations: cosmetic, minor, and major.
The committee cannot approve a Minor renovation unless a by-law has been passed by special resolution at a General Meeting to permit this to occur.
https://www.fairtrading.nsw.gov.au/ftw/Tenants_and_home_owners/Strata_schemes/Renovations.page