member of the family
(2) Member of family The term “member of the family” means, with respect to any individual, only— (A) an ancestor of such individual, (B) the spouse of such individual, (C) a lineal descendant of such individual, of such individual’s spouse, or of a parent of such individual, or (D) the spouse of any lineal descendant described in subparagraph (C). For purposes of the preceding sentence, a legally adopted child of an individual shall be treated as the child of such individual by blood.
26 USC § 2032A(e)(2)
None identified. Default scope is assumed to be the entire title.