What internal components are legally included within a Unit in a building?

The full explanation

Unless the Site Plan says otherwise, a Unit includes floors down to the base of the joists and plaster ceilings. It encompasses the internal area, non-support internal walls, and the surrounding walls of the unit. Fixtures like windows, glass, lighting systems, and door frames are also part of the unit. Additionally, integral parts like bathrooms, balconies, and allocated car parks or storage rooms are included. However, a unit does not include utility services that pass through it to serve the common parts or other units.