For the purposes of this Division, you are treated as ceasing employment when you are no longer employed by any of the following:
(a) your employer in that employment;
(b) a holding company (within the meaning of the Corporations Act 2001 ) of your employer;
(c) a * subsidiary of your employer;
(d) a * subsidiary of a holding company (within the meaning of the Corporations Act 2001 ) of your employer.