This all comes back to Part 6 of the Act and particularly Sections 106-111.
When the act was being changed, these new parts were added to simplify the requirements, but I would say it has created more confusion for many.
Further, it has been made apparent by many of the leading strata lawyers that a generic by-law is not suitable for this type of renovation and there should be specific by-laws for each lot, noting that you can not approve the renovation without a Special Resolution anyway.
The intent of this Section of the act is to address who has the ongoing responsibility for repair and maintenance of what would otherwise be considered to be common property. Take for example the situation of the typical property flippers, who come in, renovate and sell, why should the OC and other owners in the building carry the cost of fixing the renovation shortcuts when the waterproofing fails, or the tiles over tiles starts to become an issue, even in some cases I have seen, creating concrete cancer in the bathroom flooring.