(1) Before a unit plan is deposited under section 17(1), 21(1), or 24(2)(a),—
(a) every principal unit and every accessory unit must be assigned an ownership interest; and
(b) every proposed principal unit and every proposed accessory unit must be assigned a proposed ownership interest.
(2) The ownership interest or proposed ownership interest is fixed as follows:
(a) in the case of a unit plan deposited under section 17(1) or 21(1), the ownership interest is that fixed by a registered valuer on the basis of the relative value of the unit in relation to each of the other units and shown on any documentation required to be lodged with the unit plan:
(b) in the case of a stage unit plan or complete unit plan deposited under section 24(2), the ownership interest is that fixed by a registered valuer on the basis of the relative value of the unit in relation to each of the other units and shown on any documentation required to be lodged with the proposed unit development plan.
(3) The ownership interest is used to determine a range of matters, including, but not limited to,—
(a) the beneficial interest of the owner of the principal unit in the common property:
(b) the share of the owner of the principal unit in the value of any buildings, fixtures, and other improvements in relation to leasehold land:
(c) the voting rights of the owner of the principal unit when a poll is requested under section 99:
(d) the share of the owner of the principal unit in the underlying fee simple in the land on the cancellation of the unit plan:
(e) the extent of the obligation of the owner of the principal unit in respect of contributions levied by the body corporate under section 121 in respect of any capital improvement fund:
(f) the rights of the owner of the principal unit in relation to a distribution of any surplus money of a capital improvement fund under section 131:
(g) the extent of the obligation of the owner of the principal unit for payment of ground rental under section 87:
(h) the extent of the liability of the owner of the principal unit for damages and costs under section 142.
(4) The proposed ownership interest for a future development unit is the total of all the proposed ownership interests of the proposed principal units and proposed accessory units in the future development unit assigned under subsection (1)(b).
(5) The proposed ownership interest is used to determine the same range of matters described in subsection (3) in so far as they apply to an owner of a future development unit.
(6) Subject to sections 41 and 69(3), no change may be made in the ownership interest of any unit after the unit plan is deposited.