These requirements apply when the votes attached to securities, in which a
person and any of their associates have a relevant interest (as a proportion of
all voting shares or interests), increase above one of the following two
thresholds:
(a) the 5% substantial holding threshold—after which a person must
provide substantial holding notices relating to movements above or
below the threshold, and any change of 1% or more (Pt 6C.1); and
(b) the 20% takeover threshold—after which acquisitions and offers to
acquire relevant interests in voting shares or interests are only permitted
through certain transactions or in certain circumstances (Ch 6).