Income Tax Assessment Act 1936
(a) the holding company; or
(b) a company that is, or 2 or more companies each of which is, a subsidiary of the holding company; or
(c) the holding company and a company that is, or 2 or more companies each of which is, a subsidiary of the holding company. 121AP(2) [Subsidiary of subsidiary company]
If a company is a subsidiary of another company (including because of this subsection), every company that is a subsidiary of the first-mentioned company is a subsidiary of the other company.121AP(3) Wholly-owned subsidiary.
A company is a wholly-owned subsidiary of another company if it would, under subsection (1) or (2), be a subsidiary of the other company assuming that the reference in subsection (1) to at least half of the shares were instead a reference to all of the shares.