Jimmy is right, ceilings are common property, the OC needs to give permission for anything like that.
As a starter – vermiculite ceilings may or may not contain asbestos, the only way to tell is by a laboratory test. As a starting point ask the owner to give you the laboratory test they have carried out that confirms the ceiling has asbestos in it.
If it does then the issue is whether or not it needs to be removed, if it is undamaged it isn’t dangerous. It is more likely the owner wants it gone because it looks awful, which is fine, but they still need to get permission. If the ceilings do contain asbestos the owner must engage appropriate people to do it and satisfy the OC that proper processes are being followed.
You are right that if the owner replaces the ceilings then the owners will have to approve a special by-law that makes them responsible for those ceilings going forward.