20 C.F.R. § 416.216

You are a child of armed forces personnel living overseas.

            (a)
            General rule.
             For purposes of this part,
            overseas
             means any location outside the United States as defined in § 416.215;
            i.e.
            , the 50 States, the District of Columbia and the Northern Mariana Islands. You may be eligible for SSI benefits if you live overseas and if—

        (1) You are a child as described in § 416.1856;

        (2) You are a citizen of the United States; and

        (3) You are living with a parent as described in § 416.1881 who is a member of the armed forces of the United States assigned to permanent duty ashore overseas.

            (b)
            Living with.
             You are considered to be living with your parent who is a member of the armed forces if—

        (1) You physically live with the parent who is a member of the armed forces overseas; or

        (2) You are not living in the same household as the military parent but your presence overseas is due to his or her permanent duty assignment.

[58 FR 4897, Jan. 19, 1993; 58 FR 9597, Feb. 22, 1993, as amended at 59 FR 41400, Aug. 12, 1994. Redesignated at 61 FR 10277, Mar. 13, 1996; 70 FR 61366, Oct. 24, 2005]

Official source