Owned by the scheme, used by one lot
Exclusive-use arrangements sit awkwardly between the two categories everyone understands. The land or space is common property, so the scheme retains an interest in it, but a single lot has the use of it and often the obligation to look after it. Whether cleaning falls to the scheme or the lot depends on what the scheme's own records actually say. Very few owners have read the records that would tell them which applies to their own space.
This is not something to work out from the layout. The strata managing agent or the committee should be asked to confirm the position before anyone quotes, because getting it wrong means either the scheme funds one owner's private area or an owner is left with a space nobody is servicing. Both outcomes surface eventually, usually at a budget meeting or a sale. Neither is easy to unwind once several years of practice have built up around it.
