General: Definitions: Parts of assets
Treat part of an asset as an asset unless the legislation refers to the whole of an asset.
This is an example of the exception. The legislation about treating a building used partly as an industrial building and partly for other purposes as an industrial building if the part used for non-qualifying purposes is less than 25% of the whole (CA32700) refers to the whole of the building. The exception means that you cannot apply the 25% disregarded to a part of a building.