Hopefully this will help you out:
(1) Procedure for authorising changes to common property An owners corporation or an owner of a lot in a strata scheme may add to the common property, alter the common property or erect a new structure on common property for the purpose of improving or enhancing the common property.
(2) Any such action may be taken by the owners corporation or owner only if a special resolution has first been passed by the owners corporation that specifically authorises the taking of the particular action proposed.
(3) Ongoing maintenance A special resolution under this section that authorises action to be taken in relation to the common property by an owner of a lot may specify whether the ongoing maintenance of the common property once the action has been taken is the responsibility of the owners corporation or the owner.
(4) If a special resolution under this section does not specify who has the ongoing maintenance of the common property concerned, the owners corporation has the responsibility for the ongoing maintenance.