(a) General. Subject to paragraph (b) of this section, ward of the State means a child who, as determined by the State where the child resides, is -
(1) A foster child;
(2) A ward of the State; or
(3) In the custody of a public child welfare agency.
(b) Exception. Ward of the State does not include a foster child who has a foster parent who meets the definition of a parent in § 300.30.