(a) Except as provided at paragraph (b) of this section, a child age 22 or over is an eligible family member if the child is incapable of self-support because of a physical or mental disability that existed before the child reached age 22.

(b) A TEI child is a TEI family member as long as the TEI child is under the age of 21 or 23 as provided at 10 U.S.C. 1072(2)(D) or (I), and, if disabled during the age of eligibility, the TEI child remains a TEI family member regardless of age as long as the TEI child meets the standard for incapacity and support at 10 U.S.C. 1072(2)(D)(iii) or incapacity and dependency at 10 U.S.C. 1072(2)(I)(ii)(III), (iii), (iv) and (v).