Family member in respect of a sponsor means:
(a) the spouse, common-law partner or conjugal partner of the sponsor;
(b) a dependent child of the sponsor or of the sponsor's spouse or common-law partner;
and
a dependent child of a dependent child referred to in paragraph (b).
"Dependent child", in respect of a parent, means a child who
a. has one of the following relationships with the parent, namely,
i. is the biological child of the parent (PA or spouse/common-law partner),
or
ii. is the adopted child of the parent; and
b. is in one of the following situations of dependency, namely,
Is less than 22 years of age and is not a spouse or common-law partner, or
Is 22 or older and has depended substantially on the financial support of the parent and is
unable to be financially self-supporting due to a physical or mental condition.