(A)The term “dependent child” means a person who— (i)is unmarried; (ii)is (I) under 18 years of age, (II) at least 18, but under 22, years of age and pursuing a full-time course of study or training in a high school, trade school, technical or vocational institute, junior college, college, university, or comparable recognized educational institution, or (III) incapable of self support because of a mental or physical incapacity existing before the person’s eighteenth birthday or incurred on or after that birthday, but before the person’s twenty-second birthday, while pursuing such a full-time course of study or training; and (iii)is the child of a person to whom the Plan applies, including (I) an adopted child, and (II) a stepchild, foster child, or recognized natural child who lived with that person in a regular parent-child relationship. (B)For the purpose of subparagraph (A), a child whose twenty-second birthday occurs before July 1 or after August 31 of a calendar year, and while regularly pursuing such a course of study or training, is considered to have become 22 years of age on the first day of July after that birthday. A child who is a student is considered not to have ceased to be a student during an interim between school years if the interim is not more than 150 days and if the child shows to the satisfaction of the Secretary of Defense that the child has a bona fide intention of continuing to pursue a course of study or training in the same or a different school during the school semester (or other period into which the school year is divided) immediately after the interim. (C)A foster child, to qualify under this paragraph as the dependent child of a person to whom the Plan applies, must, at the time of the death of that person, also reside with, and receive over one-half of his support from, that person, and not be cared for under a social agency contract. The temporary absence of a foster child from the residence of that person, while a student as described in this paragraph, shall not be considered to affect the residence of such a foster child.