member of the immediate family
(5) The term “member of the immediate family”, in the case of a missing person, means the following: (A) The spouse of the person. (B) A natural child, adopted child, stepchild, or illegitimate child (if acknowledged by the person or parenthood has been established by a court of competent jurisdiction) of the person, except that if such child has not attained the age of 18 years, the term means a surviving parent or legal guardian of such child. (C) A biological parent of the person, unless legal custody of the person by the parent has been previously terminated by reason of a court decree or otherwise under law and not restored. (D) A brother or sister of the person, if such brother or sister has attained the age of 18 years. (E) Any other blood relative or adoptive relative of the person, if such relative was given sole legal custody of the person by a court decree or otherwise under law before the person attained the age of 18 years and such custody was not subsequently terminated before that time.
10 USC § 1513(5)
None identified. Default scope is assumed to be the entire title.