The objects of this Subdivision are:
(a) to use the Australian Geodetic Datum to determine the position of graticular sections or blocks; and
(b) to use the Geocentric Datum of Australia to determine the position of certain other areas; and
(c) to enable the position of a point, line or area to be described, in a title or other instrument under this Act, using:
(i) the Geocentric Datum of Australia; or
(ii) another datum identified in the regulations;
(but not so as to change the position of a point, line or area).