(A)
The term “child” means (except for purposes of chapter
19 of this title (other than with respect to a child who is an insurable dependent under subparagraph (B) or (C) of section 1965(10) of such chapter) and section
8502
(b) of this title) a person who is unmarried and—
(i)
who is under the age of eighteen years;
(ii)
who, before attaining the age of eighteen years, became permanently incapable of self-support; or
(iii)
who, after attaining the age of eighteen years and until completion of education or training (but not after attaining the age of twenty-three years), is pursuing a course of instruction at an approved educational institution;
and who is a legitimate child, a legally adopted child, a stepchild who is a member of a veteran’s household or was a member at the time of the veteran’s death, or an illegitimate child but, as to the alleged father, only if acknowledged in writing signed by him, or if he has been judicially ordered to contribute to the child’s support or has been, before his death, judicially decreed to be the father of such child, or if he is otherwise shown by evidence satisfactory to the Secretary to be the father of such child. A person shall be deemed, as of the date of death of a veteran, to be the legally adopted child of such veteran if such person was at the time of the veteran’s death living in the veteran’s household and was legally adopted by the veteran’s surviving spouse before August 26, 1961, or within two years after the veteran’s death; however, this sentence shall not apply if at the time of the veteran’s death, such person was receiving regular contributions toward the person’s support from some individual other than the veteran or the veteran’s spouse, or from any public or private welfare organization which furnishes services or assistance for children. A person with respect to whom an interlocutory decree of adoption has been issued by an appropriate adoption authority shall be recognized thereafter as a legally adopted child, unless and until that decree is rescinded, if the child remains in the custody of the adopting parent or parents during the interlocutory period. A person who has been placed for adoption under an agreement entered into by the adopting parent or parents with any agency authorized under law to so act shall be recognized thereafter as a legally adopted child, unless and until such agreement is terminated, if the child remains in the custody of the adopting parent or parents during the period of placement for adoption under such agreement. A person described in clause (ii) of the first sentence of this subparagraph who was a member of a veteran’s household at the time the person became 18 years of age and who is adopted by the veteran shall be recognized as a legally adopted child of the veteran regardless of the age of such person at the time of adoption.