Just thinking outside the square here.
It is likely you want to change the tiles for cosmetic reasons rather than that they have failed. ( Ifntheybhave failed it is an OC responsibility and no bylaw is required)
If the change is for cosmetic purposes, just place (and glue) your new tiles over the existing ones. Sure, there will be a change in height, but often that will not be noticeable. And no bylaw is required (in my opinion) as you are not damaging or changing the common property.
Your lot starts from the upper surface of the tiles.
Robert