I think you might need to be a bit careful here.
We’re in NSW, a multi-storey block. For many years our OC maintained all the external doors and windows and walls, however, when we changed strata managers at the next AGM the new manager brought along a strata solicitor.
He explained that since our building was built pre-1974 when different rules applied and where there was a balcony beyond the wall, door or window these items were within the Lot and were actually not common property but the individual owners’ responsibility.