There are only 3 types of Renovations: Cosmetic, Minor, or Major.
You may have missed my point about the the internal walls being attached to the common property slabs i.e. ceiling and floor.
The wall itself may not be common property, and it may not be structural, however the wall being attached to common property is important.
Therefore a wall removal will be at least a Minor Renovation. If not a Minor Renovation then it will be a Major Renovation.
The only other type of renovation is a Cosmetic Renovation. Removal of a wall is not a Cosmetic Renovation as it is not a superficial ‘day to day’ renovation e.g. hanging a painting.